#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("Equiateral");
    }
    else if(a == b || b == c || a == c);
    {
        printf("Isosceles");
    }
    else
    {
        printf("Scalene");
    }
    return 0;
    
}