题解 | #字符统计#
https://www.nowcoder.com/practice/c1f9561de1e240099bdb904765da9ad0
from collections import Counter
s=input()
dic=Counter(s)
r=''
new_list=sorted(dic.items(),key=lambda items:(-items[1],items[0]))
for item in new_list:
r+=item[0]
print(r)
s=input()
dic=Counter(s)
r=''
new_list=sorted(dic.items(),key=lambda items:(-items[1],items[0]))
for item in new_list:
r+=item[0]
print(r)
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