Problem:
Toggling Cases

Write a program which converts uppercase/lowercase letters to lowercase/uppercase for a given string.

Input

A string is given in a line.

Output

Print the converted string in a line. Note that you do not need to convert any characters other than alphabetical letters.

Constraints

The length of the input string < 1200

Sample Input

fAIR, LATER, OCCASIONALLY CLOUDY.

Sample Output

Fair, later, occasionally cloudy.

Solution in Python3 (judge verdict: Accepted)

fair = input()
ans =''

for i in fair:
    if i == i.lower():
        ans += i.upper()
    else:
        ans += i.lower()
    
print(ans)