C11111333133313232233133313331333133112111112113313231312233231   >>    C1111133313331323223313331333133313311211111211331323131223323   <<    C11111333133313232233133313331333133112111112113313231312233233   >>      C11111333133313232233133313331333133112111112113313231312233232   >>