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)

sentence = input()
for i in sentence:
    if i.isupper() == True:
        print(i.lower(), end = "")
    elif i.islower() == True:
        print(i.upper(), end = "")
    else:
        print(i, end = "")
print()