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 <cstdio>
#include <cctype>

int main()
{
    char s[1200];
    scanf("%[^\n]", s);

    for(int i = 0;s[i] != '\0'; i++){
        if(isupper(s[i])) s[i] = tolower(s[i]);
        else s[i] = toupper(s[i]);
    }
    printf("%s\n", s);
    return 0;
}