#include<stdio.h>
int main()
{
    int  n1,n2,n3;
    scanf("%d %d %d" , &n1, n2 , &n3);
    if(n1<0 || n2<0 || n3<0)
    {
        printf("Invalid Input");
    }
    else if (n1==n2 && n2==n3 )
    {
        printf("Equilateral");
    }
    else if (n1==n2 || n2==n3 || n1==n3)
    {
        printf("Isoceles");
    }
    else
    {
        printf("Scalene");
    }
    return 0;
}