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<cstring>
#include<string>

using namespace std;

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