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<cctype>
#include<cstdio>
#include<string>
using namespace std;
int main(){
string str;
getline(cin,str);
	for(int i=0;i<str.size();i++){
	if(islower(str[i]))str[i]=toupper(str[i]);
	else str[i]=tolower(str[i]);
	}
	cout<<str<<endl;
 return 0;
}