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.size(); i++)
		if(islower(str[i])) str[i] = toupper(str[i]);
		else str[i] = tolower(str[i]);
	cout << str << '\n';
}

