C11111333133313232233133313331333133313231312111111221123121331121   >>    C1111133313331323223313331333133313331323131211111122112312133112   <<    C11111333133313232233133313331333133313231312111111221123121331123   >>      C11111333133313232233133313331333133313231312111111221123121331122   >>