题解 | #删除字符串中出现次数最少的字符#

"""
看了前面老哥的代码，去运行了下报错，这里修改了下
"""


def del_min_sr(sr):
    # 字符对应出现次数的字典
    dic_sr = {}
    # 最小的出现次数
    minsr = sys.maxsize
    # 出现次数最少的字符列表
    lsr = []
    for i in sr:
        if dic_sr.get(i) != None:
            dic_sr[i] += 1
        else:
            dic_sr[i] = 1

    for a in dic_sr.keys():
        minsr = min(minsr, dic_sr.get(a))

    for vo in dic_sr.keys():
        if dic_sr[vo] == minsr:
            lsr.append(vo)
    for re in lsr:
        sr = sr.replace(re, '')
    return sr


while True:
    try:
        _sr = input().split('\r')
        for i in _sr:
            print(del_min_sr(i))
            
    except EOFError:
        break