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()
{
  char s[1201]="";
  int n=0;
  while(1)
  {
    cin.get(s[n]);
    if(s[n]=='\n') break;
    n++;
  }
  for(int i=0;i<n;i++)
    s[i]=(char)(s[i]+(('a'<=s[i]&&s[i]<='z')*('A'-'a')-(('A'<=s[i]&&s[i]<='Z')*('A'-'a'))));
  cout<<s;
}