C111123313121111121111331323133313331333132333133313331322331323132212121   >>    C11112331312111112111133132313331333133313233313331333132233132313221212   <<    C111123313121111121111331323133313331333132333133313331322331323132212123   >>      C111123313121111121111331323133313331333132333133313331322331323132212122   >>