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