C1111133313331323223313331333133313331333232233133112111133131122121   >>    C111113331333132322331333133313331333133323223313311211113313112212   <<    C1111133313331323223313331333133313331333232233133112111133131122123   >>      C1111133313331323223313331333133313331333232233133112111133131122122   >>