B3311331313231311331322331333132313331323131323223313223313133313231322123231   >>    B331133131323131133132233133313231333132313132322331322331313331323132212323   <<    B3311331313231311331322331333132313331323131323223313223313133313231322123233   >>      B3311331313231311331322331333132313331323131323223313223313133313231322123232   >>