#include <bits/stdc++.h>
using namespace std;
double a,b,c;
int main()
{
freopen("input.inp","r",stdin);
freopen("output.inp","w",stdout);
cin>>a>>b>>c;
if (a+b>c && a+c>b && b+c>a && a>0 && b>0 && c>0) cout<<"tao thanh tam giac";
else cout<<"khong tao thanh tam giac";
return 0;
}