B3311331313231311331322331333132333133311211331333132313331323223312321   >>    B331133131323131133132233133313233313331121133133313231333132322331232   <<    B3311331313231311331322331333132333133311211331333132313331323223312323   >>      B3311331313231311331322331333132333133311211331333132313331323223312322   >>