use strict;
my $str = 'Afghanistan 93 AF / AFG 29.121.286 647.500 20.65 Billion
Albania 355 AL / ALB 2.986.952 28.748 12.8 Billion
Algeria 213 DZ / DZA 34.586.184 2.381.740 215.7 Billion
American Samoa 1-684 AS / ASM 57.881 199 462.2 Million
Andorra 376 AD / AND 84.000 468 4.8 Billion
Angola 244 AO / AGO 13.068.161 1.246.700 124 Billion
Anguilla 1-264 AI / AIA 13.254 102 175.4 Million
Antarctica 672 AQ / ATA 0 14.000.000
Antigua and Barbuda 1-268 AG / ATG 86.754 443 1.22 Billion
Argentina 54 AR / ARG 41.343.201 2.766.890 484.6 Billion
Armenia 374 AM / ARM 2.968.000 29.800 10.44 Billion
Aruba 297 AW / ABW 71.566 193 2.516 Billion
Australia 61 AU / AUS 21.515.754 7.686.850 1.488 Trillion
Austria 43 AT / AUT 8.205.000 83.858 417.9 Billion
Azerbaijan 994 AZ / AZE 8.303.512 86.600 76.01 Billion
Bahamas 1-242 BS / BHS 301.790 13.940 8.373 Billion
Bahrain 973 BH / BHR 738.004 665 28.36 Billion
Bangladesh 880 BD / BGD 156.118.464 144.000 140.2 Billion
Barbados 1-246 BB / BRB 285.653 431 4.262 Billion
Belarus 375 BY / BLR 9.685.000 207.600 69.24 Billion
Belgium 32 BE / BEL 10.403.000 30.510 507.4 Billion
Belize 501 BZ / BLZ 314.522 22.966 1.637 Billion
Benin 229 BJ / BEN 9.056.010 112.620 8.359 Billion
Bermuda 1-441 BM / BMU 65.365 53 5.6 Billion
Bhutan 975 BT / BTN 699.847 47.000 2.133 Billion
Bolivia 591 BO / BOL 9.947.418 1.098.580 30.79 Billion
Bosnia and Herzegovina 387 BA / BIH 4.590.000 51.129 18.87 Billion
Botswana 267 BW / BWA 2.029.307 600.370 15.53 Billion
Brazil 55 BR / BRA 201.103.330 8.511.965 2.19 Trillion
British Indian Ocean Territory 246 IO / IOT 4.000 60
British Virgin Islands 1-284 VG / VGB 21.730 153 1.095 Billion
Brunei 673 BN / BRN 395.027 5.770 16.56 Billion
Bulgaria 359 BG / BGR 7.148.785 110.910 53.7 Billion
Burkina Faso 226 BF / BFA 16.241.811 274.200 12.13 Billion
Burundi 257 BI / BDI 9.863.117 27.830 2.676 Billion
Cambodia 855 KH / KHM 14.453.680 181.040 15.64 Billion
Cameroon 237 CM / CMR 19.294.149 475.440 27.88 Billion
Canada 1 CA / CAN 33.679.000 9.984.670 1.825 Trillion
Cape Verde 238 CV / CPV 508.659 4.033 1.955 Billion
Cayman Islands 1-345 KY / CYM 44.270 262 2.25 Billion
Central African Republic 236 CF / CAF 4.844.927 622.984 2.05 Billion
Chad 235 TD / TCD 10.543.464 1.284.000 13.59 Billion
Chile 56 CL / CHL 16.746.491 756.950 281.7 Billion
China 86 CN / CHN 1.330.044.000 9.596.960 9.33 Trillion
Christmas Island 61 CX / CXR 1.500 135
Cocos Islands 61 CC / CCK 628 14
Colombia 57 CO / COL 47.790.000 1.138.910 369.2 Billion
Comoros 269 KM / COM 773.407 2.170 658 Million
Cook Islands 682 CK / COK 21.388 240 183.2 Million
Costa Rica 506 CR / CRI 4.516.220 51.100 48.51 Billion
Croatia 385 HR / HRV 4.491.000 56.542 59.14 Billion
Cuba 53 CU / CUB 11.423.000 110.860 72.3 Billion
Curacao 599 CW / CUW 141.766 444 5.6 Billion
Cyprus 357 CY / CYP 1.102.677 9.250 21.78 Billion
Czech Republic 420 CZ / CZE 10.476.000 78.866 194.8 Billion
Democratic Republic of the Congo 243 CD / COD 70.916.439 2.345.410 18.56 Billion
Denmark 45 DK / DNK 5.484.000 43.094 324.3 Billion
Djibouti 253 DJ / DJI 740.528 23.000 1.459 Billion
Dominica 1-767 DM / DMA 72.813 754 495 Million
Dominican Republic 1-809, 1-829, 1-849 DO / DOM 9.823.821 48.730 59.27 Billion
East Timor 670 TL / TLS 1.154.625 15.007 6.129 Billion
Ecuador 593 EC / ECU 14.790.608 283.560 91.41 Billion
Egypt 20 EG / EGY 80.471.869 1.001.450 262 Billion
El Salvador 503 SV / SLV 6.052.064 21.040 24.67 Billion
Equatorial Guinea 240 GQ / GNQ 1.014.999 28.051 17.08 Billion
Eritrea 291 ER / ERI 5.792.984 121.320 3.438 Billion
Estonia 372 EE / EST 1.291.170 45.226 24.28 Billion
Ethiopia 251 ET / ETH 88.013.491 1.127.127 47.34 Billion
Falkland Islands 500 FK / FLK 2.638 12.173 164.5 Million
Faroe Islands 298 FO / FRO 48.228 1.399 2.32 Billion
Fiji 679 FJ / FJI 875.983 18.270 4.218 Billion
Finland 358 FI / FIN 5.244.000 337.030 259.6 Billion
France 33 FR / FRA 64.768.389 547.030 2.739 Trillion
French Polynesia 689 PF / PYF 270.485 4.167 5.65 Billion
Gabon 241 GA / GAB 1.545.255 267.667 19.97 Billion
Gambia 220 GM / GMB 1.593.256 11.300 896 Million
Georgia 995 GE / GEO 4.630.000 69.700 15.95 Billion
Germany 49 DE / DEU 81.802.257 357.021 3.593 Trillion
Ghana 233 GH / GHA 24.339.838 239.460 45.55 Billion
Gibraltar 350 GI / GIB 27.884 7 1.106 Billion
Greece 30 GR / GRC 11.000.000 131.940 243.3 Billion
Greenland 299 GL / GRL 56.375 2.166.086 2.16 Billion
Grenada 1-473 GD / GRD 107.818 344 811 Million
Guam 1-671 GU / GUM 159.358 549 4.6 Billion
Guatemala 502 GT / GTM 13.550.440 108.890 53.9 Billion
Guernsey 44-1481 GG / GGY 65.228 78 2.742 Billion
Guinea 224 GN / GIN 10.324.025 245.857 6.544 Billion
Guinea-Bissau 245 GW / GNB 1.565.126 36.120 880 Million
Guyana 592 GY / GUY 748.486 214.970 3.02 Billion
Haiti 509 HT / HTI 9.648.924 27.750 8.287 Billion
Honduras 504 HN / HND 7.989.415 112.090 18.88 Billion
Hong Kong 852 HK / HKG 6.898.686 1.092 272.1 Billion
Hungary 36 HU / HUN 9.982.000 93.030 130.6 Billion
Iceland 354 IS / ISL 308.910 103.000 14.59 Billion
India 91 IN / IND 1.173.108.018 3.287.590 1.67 Trillion
Indonesia 62 ID / IDN 242.968.342 1.919.440 867.5 Billion
Iran 98 IR / IRN 76.923.300 1.648.000 411.9 Billion
Iraq 964 IQ / IRQ 29.671.605 437.072 221.8 Billion
Ireland 353 IE / IRL 4.622.917 70.280 220.9 Billion
Isle of Man 44-1624 IM / IMN 75.049 572 4.076 Billion
Israel 972 IL / ISR 7.353.985 20.770 272.7 Billion
Italy 39 IT / ITA 60.340.328 301.230 2.068 Trillion
Ivory Coast 225 CI / CIV 21.058.798 322.460 28.28 Billion
Jamaica 1-876 JM / JAM 2.847.232 10.991 14.39 Billion
Japan 81 JP / JPN 127.288.000 377.835 5.007 Trillion
Jersey 44-1534 JE / JEY 90.812 116 5.1 Billion
Jordan 962 JO / JOR 6.407.085 92.300 34.08 Billion
Kazakhstan 7 KZ / KAZ 15.340.000 2.717.300 224.9 Billion
Kenya 254 KE / KEN 40.046.566 582.650 45.31 Billion
Kiribati 686 KI / KIR 92.533 811 173 Million
Kosovo 383 XK / XKX 1.800.000 10.887 7.15 Billion
Kuwait 965 KW / KWT 2.789.132 17.820 179.5 Billion
Kyrgyzstan 996 KG / KGZ 5.508.626 198.500 7.234 Billion
Laos 856 LA / LAO 6.368.162 236.800 10.1 Billion
Latvia 371 LV / LVA 2.217.969 64.589 30.38 Billion
Lebanon 961 LB / LBN 4.125.247 10.400 43.49 Billion
Lesotho 266 LS / LSO 1.919.552 30.355 2.457 Billion
Liberia 231 LR / LBR 3.685.076 111.370 1.977 Billion
Libya 218 LY / LBY 6.461.454 1.759.540 70.92 Billion
Liechtenstein 423 LI / LIE 35.000 160 5.113 Billion
Lithuania 370 LT / LTU 2.944.459 65.200 46.71 Billion
Luxembourg 352 LU / LUX 497.538 2.586 60.54 Billion
Macao 853 MO / MAC 449.198 254 51.68 Billion
Macedonia 389 MK / MKD 2.062.294 25.333 10.65 Billion
Madagascar 261 MG / MDG 21.281.844 587.040 10.53 Billion
Malawi 265 MW / MWI 15.447.500 118.480 3.683 Billion
Malaysia 60 MY / MYS 28.274.729 329.750 312.4 Billion
Maldives 960 MV / MDV 395.650 300 2.27 Billion
Mali 223 ML / MLI 13.796.354 1.240.000 11.37 Billion
Malta 356 MT / MLT 403.000 316 9.541 Billion
Marshall Islands 692 MH / MHL 65.859 181 193 Million
Mauritania 222 MR / MRT 3.205.060 1.030.700 4.183 Billion
Mauritius 230 MU / MUS 1.294.104 2.040 11.9 Billion
Mayotte 262 YT / MYT 159.042 374
Mexico 52 MX / MEX 112.468.855 1.972.550 1.327 Trillion
Micronesia 691 FM / FSM 107.708 702 339 Million
Moldova 373 MD / MDA 4.324.000 33.843 7.932 Billion
Monaco 377 MC / MCO 32.965 2 5.748 Billion
Mongolia 976 MN / MNG 3.086.918 1.565.000 11.14 Billion
Montenegro 382 ME / MNE 666.730 14.026 4.518 Billion
Montserrat 1-664 MS / MSR 9.341 102
Morocco 212 MA / MAR 31.627.428 446.550 104.8 Billion
Mozambique 258 MZ / MOZ 22.061.451 801.590 14.67 Billion
Myanmar 95 MM / MMR 53.414.374 678.500 59.43 Billion
Namibia 264 NA / NAM 2.128.471 825.418 12.3 Billion
Nauru 674 NR / NRU 10.065 21
Nepal 977 NP / NPL 28.951.852 140.800 19.34 Billion
Netherlands 31 NL / NLD 16.645.000 41.526 722.3 Billion
Netherlands Antilles 599 AN / ANT 136.197 960
New Caledonia 687 NC / NCL 216.494 19.060 9.28 Billion
New Zealand 64 NZ / NZL 4.252.277 268.680 181.1 Billion
Nicaragua 505 NI / NIC 5.995.928 129.494 11.26 Billion
Niger 227 NE / NER 15.878.271 1.267.000 7.304 Billion
Nigeria 234 NG / NGA 154.000.000 923.768 502 Billion
Niue 683 NU / NIU 2.166 260 10.01 Million
North Korea 850 KP / PRK 22.912.177 120.540 28 Billion
Northern Mariana Islands 1-670 MP / MNP 53.883 477 733 Million
Norway 47 NO / NOR 5.009.150 324.220 515.8 Billion
Oman 968 OM / OMN 2.967.717 212.460 81.95 Billion
Pakistan 92 PK / PAK 184.404.791 803.940 236.5 Billion
Palau 680 PW / PLW 19.907 458 221 Million
Palestine 970 PS / PSE 3.800.000 5.970 6.641 Billion
Panama 507 PA / PAN 3.410.676 78.200 40.62 Billion
Papua New Guinea 675 PG / PNG 6.064.515 462.840 16.1 Billion
Paraguay 595 PY / PRY 6.375.830 406.750 30.56 Billion
Peru 51 PE / PER 29.907.003 1.285.220 210.3 Billion
Philippines 63 PH / PHL 99.900.177 300.000 272.2 Billion
Pitcairn 64 PN / PCN 46 47
Poland 48 PL / POL 38.500.000 312.685 513.9 Billion
Portugal 351 PT / PRT 10.676.000 92.391 219.3 Billion
Puerto Rico 1-787, 1-939 PR / PRI 3.916.632 9.104 93.52 Billion
Qatar 974 QA / QAT 840.926 11.437 213.1 Billion
Republic of the Congo 242 CG / COG 3.039.126 342.000 14.25 Billion
Reunion 262 RE / REU 776.948 2.517
Romania 40 RO / ROU 21.959.278 237.500 188.9 Billion
Russia 7 RU / RUS 140.702.000 17.100.000 2.113 Trillion
Rwanda 250 RW / RWA 11.055.976 26.338 7.7 Billion
Saint Barthelemy 590 BL / BLM 8.450 21
Saint Helena 290 SH / SHN 7.460 410
Saint Kitts and Nevis 1-869 KN / KNA 51.134 261 767 Million
Saint Lucia 1-758 LC / LCA 160.922 616 1.377 Billion
Saint Martin 590 MF / MAF 35.925 53 561.5 Million
Saint Pierre and Miquelon 508 PM / SPM 7.012 242 215.3 Million
Saint Vincent and the Grenadines 1-784 VC / VCT 104.217 389 742 Million
Samoa 685 WS / WSM 192.001 2.944 705 Million
San Marino 378 SM / SMR 31.477 61 1.866 Billion
Sao Tome and Principe 239 ST / STP 175.808 1.001 311 Million
Saudi Arabia 966 SA / SAU 25.731.776 1.960.582 718.5 Billion
Senegal 221 SN / SEN 12.323.252 196.190 15.36 Billion
Serbia 381 RS / SRB 7.344.847 88.361 43.68 Billion
Seychelles 248 SC / SYC 88.340 455 1.271 Billion
Sierra Leone 232 SL / SLE 5.245.695 71.740 4.607 Billion
Singapore 65 SG / SGP 4.701.069 693 295.7 Billion
Sint Maarten 1-721 SX / SXM 37.429 34 794.7 Million
Slovakia 421 SK / SVK 5.455.000 48.845 96.96 Billion
Slovenia 386 SI / SVN 2.007.000 20.273 46.82 Billion
Solomon Islands 677 SB / SLB 559.198 28.450 1.099 Billion
Somalia 252 SO / SOM 10.112.453 637.657 2.372 Billion
South Africa 27 ZA / ZAF 49.000.000 1.219.912 353.9 Billion
South Korea 82 KR / KOR 48.422.644 98.480 1.198 Trillion
South Sudan 211 SS / SSD 8.260.490 644.329 11.77 Billion
Spain 34 ES / ESP 46.505.963 504.782 1.356 Trillion
Sri Lanka 94 LK / LKA 21.513.990 65.610 65.12 Billion
Sudan 249 SD / SDN 35.000.000 1.861.484 52.5 Billion
Suriname 597 SR / SUR 492.829 163.270 5.009 Billion
Svalbard and Jan Mayen 47 SJ / SJM 2.550 62.049
Swaziland 268 SZ / SWZ 1.354.051 17.363 3.807 Billion
Sweden 46 SE / SWE 9.555.893 449.964 552 Billion
Switzerland 41 CH / CHE 7.581.000 41.290 646.2 Billion
Syria 963 SY / SYR 22.198.110 185.180 64.7 Billion
Taiwan 886 TW / TWN 22.894.384 35.980 484.7 Billion
Tajikistan 992 TJ / TJK 7.487.489 143.100 8.513 Billion
Tanzania 255 TZ / TZA 41.892.895 945.087 31.94 Billion
Thailand 66 TH / THA 67.089.500 514.000 400.9 Billion
Togo 228 TG / TGO 6.587.239 56.785 4.299 Billion
Tokelau 690 TK / TKL 1.466 10
Tonga 676 TO / TON 122.580 748 477 Million
Trinidad and Tobago 1-868 TT / TTO 1.228.691 5.128 27.13 Billion
Tunisia 216 TN / TUN 10.589.025 163.610 48.38 Billion
Turkey 90 TR / TUR 77.804.122 780.580 821.8 Billion
Turkmenistan 993 TM / TKM 4.940.916 488.100 40.56 Billion
Turks and Caicos Islands 1-649 TC / TCA 20.556 430
Tuvalu 688 TV / TUV 10.472 26 38 Million
U.S. Virgin Islands 1-340 VI / VIR 108.708 352
Uganda 256 UG / UGA 33.398.682 236.040 22.6 Billion
Ukraine 380 UA / UKR 45.415.596 603.700 175.5 Billion
United Arab Emirates 971 AE / ARE 4.975.593 82.880 390 Billion
United Kingdom 44 GB / GBR 62.348.447 244.820 2.49 Trillion
United States 1 US / USA 310.232.863 9.629.091 16.72 Trillion
Uruguay 598 UY / URY 3.477.000 176.220 57.11 Billion
Uzbekistan 998 UZ / UZB 27.865.738 447.400 55.18 Billion
Vanuatu 678 VU / VUT 221.552 12.200 828 Million
Vatican 379 VA / VAT 921 0
Venezuela 58 VE / VEN 27.223.228 912.050 367.5 Billion
Vietnam 84 VN / VNM 89.571.130 329.560 170 Billion
Wallis and Futuna 681 WF / WLF 16.025 274
Western Sahara 212 EH / ESH 273.008 266.000
Yemen 967 YE / YEM 23.495.361 527.970 43.89 Billion
Zambia 260 ZM / ZMB 13.460.305 752.614 22.24 Billion
Zimbabwe 263 ZW / ZWE 11.651.858 390.580 10.48 Billion
';
my $regex = qr/^(.+?)\t([-\d, ]+)\t(.+?) .+$/mp;
my $subst = '\\3\\t\\2\\t\\1';
my $result = $str =~ s/$regex/$subst/rg;
print "The result of the substitution is' $result\n";
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Perl, please visit: http://perldoc.perl.org/perlre.html