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(){
  char c;
  while(c=getchar(),c!=EOF){
    if(c>='a'&&c<='z') c-=32,cout<<c;
    else if(c>='A'&&c<='Z') c+=32,cout<<c;
    else cout<<c;
  }
}
