#include <stdio.h>
#include <stdlib.h>


int main()
{
    char ch[10];
    scanf("%s", ch);

    switch(ch) {

    case ch:
        printf("mammal\n"); break;

    case ch:
        printf("reptile\n"); break;

    case ch:
        printf("reptile\n"); break;

    case ch:
        printf("reptile\n"); break;

    default:
        printf("unknown"); break

    }

    return 0;

}