# 我第一次写的方法:
# result_dict = {'Allen': ['red', 'blue', 'yellow'], 'Tom': ['green', 'white', 'blue'], 'Andy': ['black', 'pink']}
# key_list = sorted(list(result_dict.keys()))
# for i in key_list:
#     print("{}'s favorite colors are:".format(i))
#     for j in result_dict[i]:
#         print(j)

# 评论区学来的方法:
result_dict = {'Allen': ['red', 'blue', 'yellow'], 'Tom': ['green', 'white', 'blue'], 'Andy': ['black', 'pink']}
for m, n in sorted(result_dict.items()):
    print("%s's favorite colors are:" % m)
    for o in n:
        print(o)