Swap Every Two Vowels: The program must accept a string S as the input. The program must swap every two vowels in the string S. Then the program must print the revised string S as the output. If the number of vowels is odd, then the last vowel will remain the same as there is no pair to swap.
Note: The string S always contains at least two vowels.
Boundary Condition(s):
2 <= Length of S <= 1000
Input Format:
The first line contains S.
Output Format:
The first line contains the revised string S.
Example Input/Output 1:
Input:
environment
Output:
inverenmont
Explanation:
There are four vowels in the given string “environment“.
After swapping the vowels e and i, the string environment becomes inveronment.
After swapping the vowels o and e, the string inveronment becomes inverenmont.
Hence the output is inverenmont.
Example Input/Output 2:
Input:
TOUCHPAD
Output:
TUOCHPAD
string=list(input().strip())
pair=[]
for i in range(len(string)):
if(string[i].lower() in "aeiou"):
if(pair):
string[i],string[pair[1]]=pair[0],string[i]
pair=[]
else:
pair=[string[i],i]
print(*string,sep="")