B3311331313231311331322331333132313233313231333131323223313231323132231311   >>    B331133131323131133132233133313231323331323133313132322331323132313223131   <<    B3311331313231311331322331333132313233313231333131323223313231323132231313   >>      B3311331313231311331322331333132313233313231333131323223313231323132231312   >>