C11111211113313112113313331311211331333133313311221333132233231   >>    C1111121111331311211331333131121133133313331331122133313223323   <<    C11111211113313112113313331311211331333133313311221333132233233   >>      C11111211113313112113313331311211331333133313311221333132233232   >>