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(void){
  string x;
  getline(cin,x);
  int i = x.length();
  for(int n = 0; n < i; n++){
	if(isupper(x[n])){
	  x[n] += 32;
	}else if(islower(x[n])){
	  x[n] -= 32;
	}
  }
  
  cout << x << endl;

  return 0;
}
	  

