题解 | #单词倒排#

a = input()
temp = ''
for i in a:
    if ord('a') <= ord(i) <= ord('z'):
        temp += i 
    elif ord('A') <= ord(i) <= ord('Z'):
        temp += i 
    else:
        temp += ' '
temp = temp.split(' ')
for i in temp[::-1]:
    print(i, end=' ')