C11111333133313232233133313331333133313231312111113113313112121221   >>    C1111133313331323223313331333133313331323131211111311331311212122   <<    C11111333133313232233133313331333133313231312111113113313112121223   >>      C11111333133313232233133313331333133313231312111113113313112121222   >>