input: def fix_syntax_errors(code_snippet: str) -> str:
      """ Given a string representing a Python code snippet, detect and fix any syntax errors.
      >>> fix_syntax_errors("def test ():\n    x = 5\n    y = 3\n    z")
      "def test():\n    x = 5\n    y = 3\n    try:\n        z\n    except NameError:\n        print('NameError: Name \\'z\\' is not defined')"
      """
output:     lines = code_snippet.split('\n')
      fixed_lines = []
      for line in lines:
          if line.strip().endswith(':'):
              fixed_lines.append(line)
          else:
              try:
                  exec(line)
                  fixed_lines.append(line)
              except SyntaxError:
                  fixed_lines.append(f"try:\n    {line}\n" + "except SyntaxError:\n    print('SyntaxError: Invalid syntax')")
              except NameError:
                  fixed_lines.append(f"try:\n    {line}\n" + "except NameError:\n    print('NameError: Name \\'z\\' is not defined')")
      return '\n'.join(fixed_lines)