C1111133313331323223313331333133313113313133112111113331323211221   >>    C111113331333132322331333133313331311331313311211111333132321122   <<    C1111133313331323223313331333133313113313133112111113331323211223   >>      C1111133313331323223313331333133313113313133112111113331323211222   >>