s = input()
max_word = [""]

def cntw():
    global max_word
    max_cnt = 0
    cnt = 0
    i = len(s)-1
    while i>=0:
        if s[i]=="ｗ":
            while s[i]=="ｗ":
                cnt+=1
                i-=1
                if i<0:
                    return
            if cnt>=max_cnt:
                stock = ""
                while s[i]!="ｗ":
                    stock = s[i] + stock
                    i-=1
                    if i<0:
                        break
                if cnt==max_cnt:
                    max_word.append(stock)
                else:
                    max_cnt=cnt
                    max_word = [stock]
            cnt=0
        else:
            i-=1

cntw()
max_word.reverse()
for ans in max_word:
    print(ans)