B3311331313231311331322331333131133132333132333133313223313233313121321   >>    B331133131323131133132233133313113313233313233313331322331323331312132   <<    B3311331313231311331322331333131133132333132333133313223313233313121323   >>      B3311331313231311331322331333131133132333132333133313223313233313121322   >>