C11112331312111112111133133313331323132313232233131333132223221   >>    C1111233131211111211113313331333132313231323223313133313222322   <<    C11112331312111112111133133313331323132313232233131333132223223   >>      C11112331312111112111133133313331323132313232233131333132223222   >>