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 Python (judge verdict: Accepted)

S = raw_input()
O = ''
for s in S:
    if s.isupper():
        O += s.lower()
    elif s.islower():
        O += s.upper()
    else:
        O += s
print O