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