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