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