C11112331312111112111133133313331333132212111133133313113313231111   >>    C1111233131211111211113313331333133313221211113313331311331323111   <<    C11112331312111112111133133313331333132212111133133313113313231113   >>      C11112331312111112111133133313331333132212111133133313113313231112   >>