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 <cstdlib>
#include <iostream>

using namespace std;

int main(int argc, char *argv[])
{
	string a;
	getline(cin,a);
    for(int i=0;i<1200;i++)
     {
	  if(a[i]<91&&a[i]>64)
	  a[i]=a[i]+32;
	  else if(a[i]>96&&a[i]<123)
	  a[i]=a[i]-32;
	 }
     cout<<a<<endl;
	return 0;
}

