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>
using namespace std;
int main() {
    char c;
    while (scanf("%c", &c) != EOF) {
        if (65 <= c && c <= 90)
            c += 32;
        else if (97 <= c && c <= 122)
            c -= 32;
        printf("%c", c);
    }
}