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The countries and regions that are included in each of the three regions are:
Melanesia: Papua New Guinea, Solomon Islands, Fiji (part of which is classified as Polynesia), Vanuatu
Polynesia: Tonga, Tuvalu, Samoa, Cook Islands, Niue, Tokelau
Micronesia: Micronesia, Marshall Islands, Palau, Kiribati, Nauru