sentence = "Wow,this was really helpfull!"
punctuation = "!\"#$%&'()*+,-./:;<=>?@[\]^`{|}~"
print("".join([c if c not in punctuation else f' {c} ' for c in sentence]).strip() )
c2VudGVuY2UgPSAiV293LHRoaXMgd2FzIHJlYWxseSBoZWxwZnVsbCEiCnB1bmN0dWF0aW9uID0gIiFcIiMkJSYnKCkqKywtLi86Ozw9Pj9AW1xdXmB7fH1+IgpwcmludCgiIi5qb2luKFtjIGlmIGMgbm90IGluIHB1bmN0dWF0aW9uIGVsc2UgZicge2N9ICcgZm9yIGMgaW4gc2VudGVuY2VdKS5zdHJpcCgpICk=