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(int i=0; i < s.length();i++){
		if(islower(s[i]))
			s[i]=toupper(s[i]);
		else
			s[i]=tolower(s[i]);
	}
	cout << s << endl;
	return 0;
}