#include<stdio.h>
int main(){
    int a,b,c;
    scanf("%d %d %d,&a,&b,&c");
    if(a==b,b==c){
        printf("Equilateral");
    }else if{
       printf("Invalid Input"); 
    }if(a==b){
        printf("Isosceles");
    }else if(a<b,b<c){
        printf("Scalence")
}