C1111133313331323223313331333133313233232212111133133313123232221   >>    C111113331333132322331333133313331323323221211113313331312323222   <<    C1111133313331323223313331333133313233232212111133133313123232223   >>      C1111133313331323223313331333133313233232212111133133313123232222   >>