#include<stdio.h>
int main()
{
    int n1,n2,n3;
    
    
    if((n1==n2) and (n2==n3) and (n3==n1));
    scanf("%d",&n1);
    printf("Equilateral");
    elif((n1==n2) or (n2==n3) or (n3==n1));
    scanf("%d",&n2);
    printf("Isosceles");
    else((n1!=n2) and (n2!=n3) and (n3!=n1));
    scanf("%d",&n3);
    printf("Scalene ");
}