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