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