#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) {
        if (A == B && B == C) printf("Equilateral\n");
        else if (A == B || B == C || A == C) printf("Isosceles\n");
        else printf("Scalene\n");
    } else printf("No Triangle\n");
    
    return 0;
}