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.
#include <bits/stdc++.h>
using namespace std;
int main() {
  string s; getline(cin, s);
  for (char c : s) if (c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z') cout << char(c ^ 32); else cout << c;
  cout << endl;
}
