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 <iostream>
#include <string>

using namespace std;

int main() {
  string s;
  getline(cin, s);
  for (auto& c : s) {
    if (isupper(c)) c = tolower(c);
    else if (islower(c)) c = toupper(c);
  }
  cout << s << endl;
  return 0;
} 

