comefrom: <qiyuangong>771_Jewels_and_Stones_1.py
code: def numJewelsInStones( J, S):
      if len(J) == 0 or len(S) == 0:
          return 0
      j_set = set(J)
      ans = 0
      for c in S:
          if c in j_set:
              ans += 1
      return ans
masked: def sample_funcname ( var_0 , var_1 ) :
      if len ( var_0 ) == 0 or len ( var_1 ) == 0 :
          return 0
      var_5 = set ( var_0 )
      var_6 = 0
      for var_7 in var_1 :
          if var_7 in var_5 :
              var_6 += 1
      return var_6
  