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

