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>
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;
return 0;
}
