C1111233131211111211113313331333133313231323331333131211113313331333113213121   >>    C111123313121111121111331333133313331323132333133313121111331333133311321312   <<    C1111233131211111211113313331333133313231323331333131211113313331333113213123   >>      C1111233131211111211113313331333133313231323331333131211113313331333113213122   >>