sentence = "Wow,this was really helpfull!"
punctuation = "!\"#$%&'()*+,-./:;<=>?@[\]^`{|}~"
print( "".join([c if c not in punctuation else f' {c} ' for c in sentence]).strip().split() )
c2VudGVuY2UgPSAiV293LHRoaXMgd2FzIHJlYWxseSBoZWxwZnVsbCEiCnB1bmN0dWF0aW9uID0gIiFcIiMkJSYnKCkqKywtLi86Ozw9Pj9AW1xdXmB7fH1+IgpwcmludCggIiIuam9pbihbYyBpZiBjIG5vdCBpbiBwdW5jdHVhdGlvbiBlbHNlIGYnIHtjfSAnIGZvciBjIGluIHNlbnRlbmNlXSkuc3RyaXAoKS5zcGxpdCgpICk=