C1111233131211111211113313331333133313232321333131333132311233121   >>    C111123313121111121111331333133313331323232133313133313231123312   <<    C1111233131211111211113313331333133313232321333131333132311233123   >>      C1111233131211111211113313331333133313232321333131333132311233122   >>