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<algorithm>
using namespace std;

int main(){
	string S;
	getline(cin,S);
	for(int i=0;i<S.length();++i){
		if(S[i]>='a' && S[i]<='z')S[i]-=0x20;
		else if(S[i]>='A' && S[i]<='Z')S[i]+=0x20;
	}
	cout<<S<<endl;
}
