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(int i = 0; i < s.size(); i++) {
    if(isupper(s.at(i))) s.at(i) = tolower(s.at(i));
    else if(islower(s.at(i))) s.at(i) = toupper(s.at(i));
  }

  cout << s << "\n";
}
