B3311331313231311331322331333132313231323331333131333133313232313211   >>    B331133131323131133132233133313231323132333133313133313331323231321   <<    B3311331313231311331322331333132313231323331333131333133313232313213   >>      B3311331313231311331322331333132313231323331333131333133313232313212   >>