题解 | #单词倒排#

a = str(input())
lst1 = list(a)
len1 = len(lst1)

lst2 = []

def judgezimu(a):
    if((ord(a)>=65 and ord(a)<=90) or (ord(a)>=97 and ord(a)<=122)):
        return True
    else:
        return False
b=""       
for i in range(0,len1):
    if judgezimu(lst1[i]) is True:
        b+=lst1[i]
        if i==(len1-1):
            lst2.append(b)
    else:
        if b != "":
            lst2.append(b)
            b=""
            continue
    
        
for i in range(len(lst2)):
        print(lst2[len(lst2)-i-1],end=" ")