C11112331312111112111133133313331323132313232233133313123232233221   >>    C1111233131211111211113313331333132313231323223313331312323223322   <<    C11112331312111112111133133313331323132313232233133313123232233223   >>      C11112331312111112111133133313331323132313232233133313123232233222   >>