#define _XOPEN_SOURCE 600
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

int main() {
    char data[4096];
    int i;
    while ((i=fread(data, 2, 2048, stdin))) {
	swab(data, data, 4096);
	fwrite(data, 2, i, stdout);
    }
    exit(0);
}