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>
using namespace std;
int main(){
	string s;
	getline(cin,s);
	int a=s.size();
	for(int i=0;a>i;i++){
		if(s[i] >='A' && s[i] <= 'Z'){
			s[i]=s[i]+32;
		}
		else if(s[i] >='a' && s[i] <= 'z'){
			s[i]=s[i]-32;
		}
	}
	cout<<s<<endl;
}


