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 row;
	getline(cin,row);
	for(int i=0;i<row.size();i++){
		if(islower(row[i])!=0){
			row[i]=toupper(row[i]);
		}
		else {
			row[i]=tolower(row[i]);
		}
	}
	cout<<row<<endl;
	return 0;
}
