题解 | #字典新增#

from collections import defaultdict

c = input()
word = input()

dd = defaultdict(list)

dict1 = {
    "a": ["apple", "abandon", "ant"],
    "b": ["banana", "bee", "become"],
    "c": ["cat", "come"],
    "d": "down",
}

dd.update(dict1)

if isinstance(dd[c], str):
    tmp = dd[c]
    dd[c] = [dd[c], word]

if dd[c] == []:
    dd[c] = word

print(dict(dd))