import re
content = """
id-HTRY098WE
id-KNGT371WE?witkl
id-ZXV555NQE?phnu
eh-VCBG075LK
"""
for item in re.findall(r'id-([^?\s]+)',content):
print(item)
aW1wb3J0IHJlCgpjb250ZW50ID0gIiIiCmlkLUhUUlkwOThXRQppZC1LTkdUMzcxV0U/d2l0a2wKaWQtWlhWNTU1TlFFP3BobnUKZWgtVkNCRzA3NUxLCiIiIgpmb3IgaXRlbSBpbiByZS5maW5kYWxsKHInaWQtKFteP1xzXSspJyxjb250ZW50KToKICAgIHByaW50KGl0ZW0p