#include<stdio.h>
#include<conio.h>
int main()
{
    int n1,n2,n3;
    if(n1==n2==n3){
        printf("Equilateral");
    }
    if(n1==n2&n2==n3&n1==n3){
        printf("Isosceles");
        
    }
    if(n1!==n2&n2!==n3&n1!==n3){
        printf("Scalene");
    }
    else{
        printf("Invalid Input");
    }
    }
    
    }
}