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

Constraints

* The length of the input string < 1200

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.

Example

Input

fAIR, LATER, OCCASIONALLY CLOUDY.


Output

Fair, later, occasionally cloudy.
slist = raw_input().split(" ")

def conv_char(c):
    if c.isupper(): return c.lower()
    return c.upper()
    
print " ".join(["".join([conv_char(c) for c in s]) for s in slist])