B3311331313231311331322331333132333133311211331333132313331323233232212321   >>    B331133131323131133132233133313233313331121133133313231333132323323221232   <<    B3311331313231311331322331333132333133311211331333132313331323233232212323   >>      B3311331313231311331322331333132333133311211331333132313331323233232212322   >>