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