B3311331313231311331322331333132333131333132233133313233313231211231   >>    B331133131323131133132233133313233313133313223313331323331323121123   <<    B3311331313231311331322331333132333131333132233133313233313231211233   >>      B3311331313231311331322331333132333131333132233133313233313231211232   >>