#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 output\n");
    }
    else if(a + b <= c,a + c <= b,b + a <= c)
    else if(a==b&&b==c)
    {
        printf("Equilateral\n");
    }
    else if(a==b,b==c,a==c)
    {
        printf("Isoceles\n");
    }
    else
    {
        printf("Scalene\n");
    }
    return 0;
}