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;
#define int long long
int mod=1e9+7;

signed main(){
  string s;
  getline(cin,s);
  for(int i=0;i<s.size();i++){
    if(s[i]>='a'&&s[i]<='z')s[i]-='a'-'A';
    else if(s[i]>='A'&&s[i]<='Z')s[i]+='a'-'A';
  }
  cout<<s<<endl;
}

