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;
#define ll long long

int main(){
  
  string str;  
  getline(cin, str);
  for(char c: str){
    cout <<  (isupper(c)? (char)tolower(c): (char)toupper(c));
  }
  cout << endl;
  return 0;
}