C11111211113313112113313331333133313331333131211111133131133132233132223231   >>    C1111121111331311211331333133313331333133313121111113313113313223313222323   <<    C11111211113313112113313331333133313331333131211111133131133132233132223233   >>      C11111211113313112113313331333133313331333131211111133131133132233132223232   >>