题解 | #单词倒排#

a = input()
b = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
c = []
for i in b:
    c.append(i)
for i in a:
    if i in c:
        continue
    else:
        a = a.replace(i,' ')
l = a.split()
l.reverse()
b = " ".join(l)
print(b)

我这个好像也行的