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(void){
  string s,a;
  getline(cin,s);
  for(int i=0;i<s.size();++i){
    if('a'<=s[i]&&s[i]<='z')a+=toupper(s[i]);
    else a+=tolower(s[i]);
  }
  cout<<a<<endl;
  return 0;
}