找重复字母的单词

#找重复字母的单词
str_list=input().split()
str_new=[]
for i in range (len(str_list)):
    flag=0
    j=0
    while j<len(str_list[i]):
        k=j+1
        while k<len(str_list[i]):
            if(list(str_list[i])[j]==list(str_list[i])[k]):
                flag=1
            k+=1
        j+=1
    if(flag==1):
        str_new.append(str_list[i])
#print(str_new)
str_out = " ".join(str_new)
print(str_out)