C11111333133313232233133313331333131133132313311211111211113311221123123231   >>    C1111133313331323223313331333133313113313231331121111121111331122112312323   <<    C11111333133313232233133313331333131133132313311211111211113311221123123233   >>      C11111333133313232233133313331333131133132313311211111211113311221123123232   >>