#!/usr/bin/python3

import re



re_invna = re.compile(r'"([A-z]+), ([A-z]+)" (<[^ >]+@[^ ]+>)')

test = 'Dec 20 07:43:12 2021 (3287959) nep-rmg: new "Gilju, Kim" <kjkim'
test += 'yn@naver.com>, via web confirmation'

print(test)
changed = re_invna.sub('"\\2 \\1" \\3', test)

print(changed)