题解 | #单词倒排#

s = input()

for i in s:
    if 65 <= ord(i) <= 90 or 97 <= ord(i) <= 122:
        continue
    else:
        s = s.replace(i, ' ')

a = list(map(str,s.split()))

a = a[::-1]

for j in range(len(a)):
    print(a[j], end = ' ')