B3311331313231311331322331333132333133313231332113313331333133311212312121   >>    B331133131323131133132233133313233313331323133211331333133313331121231212   <<    B3311331313231311331322331333132333133313231332113313331333133311212312123   >>      B3311331313231311331322331333132333133313231332113313331333133311212312122   >>