#include <stdio.h>
#include <string.h>

int main(void)
{
	char s[2][11], u;
	int i = 0, j, t, k;
	scanf("%s\n%s", *s, s[1]);
	t = strlen(*s) - 1;
	for (i; i < t; i++) {
		for (j = t; i < j; j--) {
			for (k = 0; k < 2; k++) {
				if (s[k][j - 1] < s[k][j]) {
					u = s[k][j - 1];
					s[k][j - 1] = s[k][j];
					s[k][j] = u;
				}
			}
		}
	}
	printf("%s %s\n", *s, s[1]);
	puts(strcmp(*s, s[1]) ? "NO" : "YES");
	return 0;
}