file_input
  stmt
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                                    shift_expr
                                      arith_expr
                                        term
                                          factor
                                            power
                                              atom
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                    test
                      or_test
                        and_test
                          not_test
                            comparison
                              expr
                                xor_expr
                                  and_expr
                                    shift_expr
                                      arith_expr
                                        term
                                          factor
                                            power
                                              atom
                                                T_STRING: '"OK"'
              T_NEWLINE: '\n'
          stmt
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              small_stmt
                print_stmt
                  T_NAME: 'print'
                  test
                    or_test
                      and_test
                        not_test
                          comparison
                            expr
                              xor_expr
                                and_expr
                                  shift_expr
                                    arith_expr
                                      term
                                        factor
                                          power
                                            atom
                                              T_NAME: 'n'
              T_NEWLINE: '\n'
          T_DEDENT: ''
  stmt
    simple_stmt
      small_stmt
        expr_stmt
          testlist
            test
              or_test
                and_test
                  not_test
                    comparison
                      expr
                        xor_expr
                          and_expr
                            shift_expr
                              arith_expr
                                term
                                  factor
                                    power
                                      atom
                                        T_NAME: 'f'
                                      trailer
                                        T_LPAR: '('
                                        T_RPAR: ')'
      T_NEWLINE: '\n'
  T_ENDMARKER: ''