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 a;getline(cin,a);
  for(int i=0;i<a.length();i++){
    if((a.at(i)>='a')&(a.at(i)<='z')){
      a.at(i)-=32;
    }else if((a.at(i)>='A')&(a.at(i)<='Z')){
      a.at(i)+=32;
    }
  }
  cout<<a<<endl;
}
