B3311331313231311331322331333132333133313231332113313331333133313112231322121   >>    B331133131323131133132233133313233313331323133211331333133313331311223132212   <<    B3311331313231311331322331333132333133313231332113313331333133313112231322123   >>      B3311331313231311331322331333132333133313231332113313331333133313112231322122   >>