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 (auto &c : s) {
    if (islower(c))
      c = toupper(c);
    else if (isupper(c))
      c = tolower(c);
  }
  cout << s << endl;

  return 0;
}

