题解 | #删除字符串中出现次数最少的字符#

s = input()
dic = {}
res = ''

for k in s:
    if k not in dic:
        dic[k] = 1
    else:
        dic[k] = dic[k] + 1

Min = min(dic.values())

for i in s:
    if dic[i] != Min:
        res += i

print(res)