int main()

{
    int z, q, s, l, x1, x2, x3, x4;
    for(z = 10; z <= 50; z = z + 10)
    {
        for(q = 10; q <= 50; q = q + 10)
        {
             for(s = 10; s <= 50; s = s + 10)
             {
                  for(l = 10; l <= 50; l = l + 10)
                  {
                       if(((z+q)==(s+l))&&((z+l)>(s+q))&&((z+s)<q))
                       {
                           if(q > l)
                           {
                                cout << "q " << q << endl;
                                cout << "l " << l << endl;
                                cout << "s " << s << endl; 
                                cout << "z " << z << endl;
                           }
                           else
                           {
                                cout << "l " << l << endl;
                                cout << "q " << q << endl;
                                cout << "z " << z << endl; 
                                cout << "s " << s << endl;
                           }
                       }
                  }
             }
        }
    }
    return 0;
}
