#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;
        }