B3311331313231311331322331333132313331323133313233313133313232313211   >>    B331133131323131133132233133313231333132313331323331313331323231321   <<    B3311331313231311331322331333132313331323133313233313133313232313213   >>      B3311331313231311331322331333132313331323133313233313133313232313212   >>