C1111233131211111211113313331333133313231323331333133313232212322123211231   >>    C111123313121111121111331333133313331323132333133313331323221232212321123   <<    C1111233131211111211113313331333133313231323331333133313232212322123211233   >>      C1111233131211111211113313331333133313231323331333133313232212322123211232   >>