C1111233131211111211113313331333133313331312331333132333132333132213121   >>    C111123313121111121111331333133313331333131233133313233313233313221312   <<    C1111233131211111211113313331333133313331312331333132333132333132213123   >>      C1111233131211111211113313331333133313331312331333132333132333132213122   >>