#include <string>

using namespace std;

class NoCaseCompare
{
public:
    NoCaseCompare();
    ~NoCaseCompare();

    bool operator() ( const string& s, const string& t ) const
    {
        return lexicographical_compare (
                   s.begin(), s.end(),
                   t.begin(), t.end(),
                   noCaseCompare );
    }
private:
    static bool noCaseCompare ( char c1, char c2 )
    {
        return toupper ( c1 ) < toupper ( c2 );
    }
};