C11111333133313232233133313331333131133132313311211111211111213121221   >>    C1111133313331323223313331333133313113313231331121111121111121312122   <<    C11111333133313232233133313331333131133132313311211111211111213121223   >>      C11111333133313232233133313331333131133132313311211111211111213121222   >>