#include<stdio.h>
int main()
    int n1,n2,n3;
    scanf("%d %d %d",&n1 &n2,&n3);
    if(a==b&&b==c){
        printf("Equilateral");
    }
    else if(a==b or b==c){
        printf("Isosceles");
    }
    else if(a!=b||b!=c){
        printf("Scalene");
    }
    else{
        printf("Invalid input");
    }