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