B3311331313231311331322331333132313233313233313113313232113313231322311   >>    B331133131323131133132233133313231323331323331311331323211331323132231   <<    B3311331313231311331322331333132313233313233313113313232113313231322313   >>      B3311331313231311331322331333132313233313233313113313232113313231322312   >>