hile' while='1' ':' any+ >
        |
        sorted=any<
            any*
            simple_stmt<
              expr_stmt< id1=any '='
                         power< list='list' trailer< '(' (not arglist<any+>) any ')' > >
              >
              '\n'
            >
            sort=
            simple_stmt<
              power< id2=any
                     trailer< '.' 'sort' > trailer< '(' ')' >
              >
              '\n'
            >
            next=any*
        >
        |
        sorted=any<
            any*
            simple_stmt< expr_stmt< id1=any '=' expr=any > '\n' >
            sort=
            simple_stmt<
              power< id2=any
                     trailer< '.' 'sort' > trailer< '(' ')' >
              >
              '\n'
            >
            next=any*
        >
    c