B3311331313231311331322331333132313231333131323223313133313133313232212323231   >>    B331133131323131133132233133313231323133313132322331313331313331323221232323   <<    B3311331313231311331322331333132313231333131323223313133313133313232212323233   >>      B3311331313231311331322331333132313231333131323223313133313133313232212323232   >>