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<ctype.h>
#include<string>
 
using namespace std;
 
int main(){
  string s;
  getline(cin,s);
  for(int i=0;i<s.length();i++){
    if(islower(s[i]))
      s[i]=toupper(s[i]);
    else
      s[i]=tolower(s[i]);
  }
  cout << s << endl;
}