#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\n");
    }
    else if(a == b && b == c)
    {
        printf("Equilateral\n");
    }
    else if ( a == b || b == c || a == c)
    {
        printf("Isosceles\n");
    }
    else
    {
        print("Scanlene\n");
    }
    return 0;
}