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