#include <iostream>
#define fi ""
#define fo ""
using namespace std;
int a, b, c;
int main() 
{
    freopen(fi, "r", stdin);
    freopen(fo, "w", stdout);
    while(cin >> a >> b >> c)
    {
        if(a + b > c && a + c > b && b + c > a)
        {
            if(a*a + b*c == c*c || a*a + c*c == b*b || b*b + c*c == a*a)
            {
                cout << "vuong ";
                if(a == b || b == c || a == c) cout << "can ";
            }
            else if (a == b || b == c || a == c) cout << "can ";
            else if(a == b && b == c) cout << "deu ";
            else cout << "thuong ";
            
        }
        else cout << "khong ";
        cout << "\n";
    }
    
    return 0;
}

$#khanhtaon$

\

#include <bits/stdc++.h>
using namespace std;
#define int long long
signed main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	int a,b,c;
	cin>>a>>b>>c;
	if(a+b>c&&a+c>b&&b+c>a){//BDT tam giac
		if(a==b&&b==c){
			cout<<"deu";
		}
		else if(a*a+b*b==c*c||a*a+c*c==b*b||b*b+c*c==a*a){
			if(a==b||a==c||b==c){
				cout<<"vuong can";
			}
			else cout<<"vuong";
		}
		else if(a==b||b==c||a==c){
			cout<<"can";
		}
		else cout<<"thuong";
	}
	else cout<<"khong";
}