#include<stdio.h>
int nain(){
    int a, b, c;
    scanf("%d %d %d", &a, &b, &c );
    if (a<= 0 || b<=0 || c<=0){
        printf("Invalid Input\n");
    }else if (a == b && b ==c) {
        printf("Equilateral\n");
    }else if (a == b || b == c || a == c) {
        printf("Isosceles\n");
    }else {
        printf("Scalene\n");
    }
    return 0;
}