C1111233131211111211113313331333133313331333131211111333133313232213232331   >>    C111123313121111121111331333133313331333133313121111133313331323221323233   <<    C1111233131211111211113313331333133313331333131211111333133313232213232333   >>      C1111233131211111211113313331333133313331333131211111333133313232213232332   >>