C11111333133313232233133313331333133313231313231323133313223221   >>    C1111133313331323223313331333133313331323131323132313331322322   <<    C11111333133313232233133313331333133313231313231323133313223223   >>      C11111333133313232233133313331333133313231313231323133313223222   >>