# 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 (a==b || b==c || c==a){
        printf("Isoscelenes");
    }else if (a<0 || b<0 || c<0){
        printf("Invalid input");
    }else{
        printf("Scaalene")
    }
}