B3311331313231311331322331333132313331322121133133313331333131123331321   >>    B331133131323131133132233133313231333132212113313331333133313112333132   <<    B3311331313231311331322331333132313331322121133133313331333131123331323   >>      B3311331313231311331322331333132313331322121133133313331333131123331322   >>