B3311331313231311331322331333132333132313321333132313233313232211   >>    B331133131323131133132233133313233313231332133313231323331323221   <<    B3311331313231311331322331333132333132313321333132313233313232213   >>      B3311331313231311331322331333132333132313321333132313233313232212   >>