题解 | #删除字符串中出现次数最少的字符#

while True:
    try:
        strs = input()
        from collections import Counter
        dicts = Counter(strs)        # 可以形成一个字典，以字母为key，出现的次数为value
        MinNum = min(dicts.values())    # 找到字母出现次数最小数
        for key in dicts:
            if dicts[key] == MinNum:    # 如果字典的value是最小出现次数，则删除对应字母
                strs = strs.replace(key, "")    # 把对应的字符替换成空
        print(strs)
    except:
        break