B3311331313231311331322331333132333133313132233133313233313221231   >>    B331133131323131133132233133313233313331313223313331323331322123   <<    B3311331313231311331322331333132333133313132233133313233313221233   >>      B3311331313231311331322331333132333133313132233133313233313221232   >>