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