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.size();i++){
		if('A'<=a[i]&&a[i]<='Z'){
			a[i]+=32;
		}
		else if('a'<=a[i]&&a[i]<='z'){
			a[i]-=32;
		}
		cout<<a[i];
	}
	cout<<endl;

	return 0;
}
