C1111233131211111211113313331333133313133313231211111133132233323233121   >>    C111123313121111121111331333133313331313331323121111113313223332323312   <<    C1111233131211111211113313331333133313133313231211111133132233323233123   >>      C1111233131211111211113313331333133313133313231211111133132233323233122   >>