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.
#!/usr/bin/env python

if __name__ == '__main__':
    s = map(ord, list(raw_input()))
    for i in range(len(s)):
        if s[i] > 0x40 and (s[i]-0x41)%0x20 < 0x1a:
            s[i]^=0x20
    print ''.join(map(chr, s))

