#include <stdio.h>
int 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 && a == c){
    printf("Equilateral");
    }
    else if(a == b||b == c||c == a ){
    printf"Isoceles");
    }
    else{
        printf("Scalene");
    }
    return 0;
}