C1111233131211111211113313331333133313232321331133132313331312231   >>    C111123313121111121111331333133313331323232133113313231333131223   <<    C1111233131211111211113313331333133313232321331133132313331312233   >>      C1111233131211111211113313331333133313232321331133132313331312232   >>