#include <stdio.h>
int main(){
    int a,b,c;
    scanf("%d %d %d", &a, &b, &c);
    if (a <= 0 || b <= 0 || c <= 0)
    {
        printf("No Triangle\n");
    }
    else if(a > 0 && b > 0 && c > 0 && (a+b) > c && (b+c) > a && (a+c) > b)
    {
        if(a == b && a == c)
        {
            printf("Equilateral\n");
        }
        else if(a == b || a == c || b == c)
        {
            printf("Isosceles\n");
        }
        
        else
        {
            printf("Scalene\n");
        }
    }  
    else
    {
        printf("No Triangle\n");
    }    
     
    return 0;
}