these are the only countries that begin with m, i think,
Macau ~ Macedonia ~ Madagascar ~ Madeira ~ Malawi
Malaysia ~ Maldives ~ Mali ~ Malta ~ Malvinas ~ Marshall Islands ~
Martinique ~ Mauritania ~ Mauritius ~ Melilla
Mexico ~ Micronesia ~ Moldova ~ Monaco ~ Mongolia
Montserrat ~ Morocco ~ Mozambique ~ Myanmar
and madagascar, martinique, mauritania, Micronesia, monserrat have ten letters, if that helps.