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 a;
	getline(cin,a);
	for(int b=0;b<a.length();b++){
		if(a[b]>='a'&&a[b]<='z')cout<<(char)(a[b]-32);
		else if(a[b]>='A'&&a[b]<='Z')cout<<(char)(a[b]+32);
		else cout<<a[b];
		}
		cout<<endl;
}