Given a string x with balanced paranthesis, return list of output strings by adding substring to prefix and suffix\n\nExample:\n1. **Input**: foo{bar, cat}dog **Output**: [\'foobardog\', \'foocatdog\']\n2. **Input**: foo{bar, cat {dog, egg}}baz **Output**:[\'foobarbaz\', \'foocatdogbaz\', \'foocateggbaz\']

Given a string x with balanced paranthesis, return list of output strings by adding substring to prefix and suffix\n\nExample:\n1. Input: foo{bar, cat}dog Outpu