C1111233131211111211113313331323133313231333133322133313232213231323121   >>    C111123313121111121111331333132313331323133313332213331323221323132312   <<    C1111233131211111211113313331323133313231333133322133313232213231323123   >>      C1111233131211111211113313331323133313231333133322133313232213231323122   >>