#include<stdio.h>
int mani(){
    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("Isosceles");
    }
    else if (a == b || b == c || a == c)
    {
        printf("Isosceles");
    }
    else
    {
        printf("scalene");
    }
    return 0;
}