comefrom: <qiyuangong>389_Find_the_Difference_1.java
code: public char findTheDifference(String s, String t) {
          int total = t.charAt(s.length());
          for (int i = 0; i < s.length(); i++)
              total += (t.charAt(i) - s.charAt(i));
          return (char) total;
      }
masked: public char sample_funcname ( String var_0 , String var_1 ) {
    int var_2 = var_1 . charAt ( var_0 . length ( ) ) ;
    for ( int var_3 = 0 ;
    var_3 < var_0 . length ( ) ;
    var_3 ++ ) var_2 += ( var_1 . charAt ( var_3 ) - var_0 . charAt ( var_3 ) ) ;
    return ( char ) var_2 ;
  }
  