C11111333133313232233133313331333133313331311211331323133313121   >>    C1111133313331323223313331333133313331333131121133132313331312   <<    C11111333133313232233133313331333133313331311211331323133313123   >>      C11111333133313232233133313331333133313331311211331323133313122   >>