B3311331313231311331322331333132313132313331323223313133313331323233231231   >>    B331133131323131133132233133313231313231333132322331313331333132323323123   <<    B3311331313231311331322331333132313132313331323223313133313331323233231233   >>      B3311331313231311331322331333132313132313331323223313133313331323233231232   >>