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>
using namespace std;

int main() {
  string s;
  getline(cin, s);
  for (int i=0; i<s.size(); i++) {
    if (s[i] >= 'A' && s[i] <= 'Z')
      s[i] = s[i] + 32;
    else if (s[i] >= 'a' && s[i] <= 'z')
      s[i] = s[i] - 32;
  }
  cout << s << endl;
}
