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 Ruby (judge verdict: Wrong Answer)

aryExchangeChar = gets.chars;

for charIndex in 0..aryExchangeChar.length-1 do
	
	print aryExchangeChar[charIndex].downcase;
	
end

print "\n\r";