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>
int main(){
	std::string s;
	int i=0;
	getline(std::cin,s);
	while (s[i] != '\0'){
		if (s[i] >= 65 && s[i] <= 90)s[i] += 32;
		else if(s[i] >= 97 && s[i] <= 122)s[i] -= 32;
		++i;
	}
	std::cout << s << std::endl;
}