#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 && b==c){
    printf("Equilateral");}
    else if(a==b || b==c || a==c){
    printf("Isoceles");
        else{
    printf("Scalene");                                                                                                                                                  
        }
    return 0;
        }