B3311331313231311331322331333132313331322121133133313331323132323112321   >>    B331133131323131133132233133313231333132212113313331333132313232311232   <<    B3311331313231311331322331333132313331322121133133313331323132323112323   >>      B3311331313231311331322331333132313331322121133133313331323132323112322   >>