comefrom: <awangdev>Word Ladder II_2.java
code: public ArrayList<String> expand(String str, Set<String> dict) {
          ArrayList<String> list = new ArrayList<String>();
          for (int i = 0; i < str.length(); i++) {
              for (int j = 0; j < 26; j++) {
                  if (str.charAt(i) != (char)('a' + j)) {
                      String newStr = str.substring(0, i) + (char)('a' + j) + str.substring(i + 1);
                      if (dict.contains(newStr)) {
                          list.add(newStr);
                      }
                  }
              }
          }
          return list;
      }
masked: public ArrayList < String > var_1 ( String var_2 , Set < String > var_4 ) {
    ArrayList < String > var_6 = new ArrayList < String > ( ) ;
    for ( int var_8 = 0 ;
    var_8 < var_2 . length ( ) ;
    var_8 ++ ) {
      for ( int var_10 = 0 ;
      var_10 < 26 ;
      var_10 ++ ) {
        if ( var_2 . charAt ( var_8 ) != ( char ) ( 'a' + var_10 ) ) {
          String var_16 = var_2 . substring ( 0 , var_8 ) + ( char ) ( 'a' + var_10 ) + var_2 . substring ( var_8 + 1 ) ;
          if ( var_4 . contains ( var_16 ) ) {
            var_6 . add ( var_16 ) ;
          }
        }
      }
    }
    return var_6 ;
  }
  