<gouthampradhan>hashing_NumberOfAtoms_1.java
private Map<String, Integer> merge(Map<String, Integer> left, Map<String, Integer> right) {
    for (String k : left.keySet()) {
      if (right.containsKey(k)) {
        right.put(k, right.get(k) + left.get(k));
      } else right.put(k, left.get(k));
    }
    return right;
  }
private Map < String , Integer > var_2 ( Map < String , Integer > var_4 , Map < String , Integer > var_5 ) {
  for ( String var_7 : var_4 . keySet ( ) ) {
    if ( var_5 . containsKey ( var_7 ) ) {
      var_5 . put ( var_7 , var_5 . get ( var_7 ) + var_4 . get ( var_7 ) ) ;
    }
    else var_5 . put ( var_7 , var_4 . get ( var_7 ) ) ;
  }
  return var_5 ;
}
