https://www.hackerrank.com/challenges/swap-case
You are given a string and your task is to swap cases. In other words, convert all lowercase letters to uppercase letters and vice versa.
For Example
Www.HackerRank.com → wWW.hACKERrANK.COM
Pythonist 2 → pYTHONIST 2
Input Format
A single line containing a string S.
Output Format
Print the modified string S.
Sample Input 0
HackerRank.com presents "Pythonist 2".
Sample Output 0
hACKERrANK.COM PRESENTS "pYTHONIST 2".