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>
#include<string>
using namespace std;

int main(){
	string a;
	getline(cin, a);
	for(int i = 0; i < a.length(); i++){
		if(a[i] < 91 && a[i] > 64)
			a[i] += 32;
		else if(a[i] > 96 && a[i] < 123)
			a[i] -= 32;
	}
	cout << a << endl;
}
