#include <stdio.h>

int main() {
    int a, b, c;
    scanf("%d%d%d", &a, &b, &c);

    if(a + b > c && a + c > b && b + c > a) {
        printf("TRIAGOLNIK\n");
    }
    else {
        printf("NISHTO\n");
    }

    return 0;

}