Time Limit : sec, Memory Limit : KB

# 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.