C11111333133313232233133313331333133112111112113313331312111112111133331221   >>    C1111133313331323223313331333133313311211111211331333131211111211113333122   <<    C11111333133313232233133313331333133112111112113313331312111112111133331223   >>      C11111333133313232233133313331333133112111112113313331312111112111133331222   >>