C1111133313331323223313331333133313331333232233133112111133233111   >>    C111113331333132322331333133313331333133323223313311211113323311   <<    C1111133313331323223313331333133313331333232233133112111133233113   >>      C1111133313331323223313331333133313331333232233133112111133233112   >>