C111123313331323113313331333133313331323132333132333132313231211231   >>    C11112331333132311331333133313331333132313233313233313231323121123   <<    C111123313331323113313331333133313331323132333132333132313231211233   >>      C111123313331323113313331333133313331323132333132333132313231211232   >>