comefrom: <awangdev>140. Word Break II_1.java
code: private String output(List<String> list) {
  
          StringBuffer sb = new StringBuffer();
          for (String s : list) sb.append(s).append(" ");
          return sb.toString().trim();
      }
masked: private String var_0 ( List < String > var_1 ) {
    StringBuffer var_2 = new StringBuffer ( ) ;
    for ( String var_3 : var_1 ) var_2 . append ( var_3 ) . append ( " " ) ;
    return var_2 . toString ( ) . trim ( ) ;
  }
  