#include <stdio.h>

void main(){
    int a,b,c;
    scanf(%d %d %d ,a,b,c);
    if(a<0 || b<0 || c<0){
        printf("Invalid Input");
    }
    else if(a == b && b == c && c == a){
        printf("Equilateral");
    }
    return 0;
}