C111123313331323113313331333133313121111133112111133132233133313113313231323231   >>    C11112331333132311331333133313331312111113311211113313223313331311331323132323   <<    C111123313331323113313331333133313121111133112111133132233133313113313231323233   >>      C111123313331323113313331333133313121111133112111133132233133313113313231323232   >>