WCIPEG Mirrored Pairs (C++)

#include <iostream>
#include <string>

using namespace std;

int main()
{
    string s;
    cout << "Ready\n";

    while (getline(cin, s), s!= "  ")
    {
        if (s == "bd" || s == "db" || s == "pq" || s == "qp")
        {
            cout << "Mirrored pair\n";
        }
        else
        {
            cout << "Ordinary pair\n";
        }
    }
    return 0;
}