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

int main()
{
	char strA[11];
	char strB[11];
	scanf("%s", strA);
	scanf("%s", strB);

	for (int i = 0; strB[i]!='\0'; i++) {
		for (int j = 0; strA[j]!='\0'; j++) {
			if (strB[i] == strA[j]) {
				strB[i] = '0';
				strA[j] = '0';
				break;
			}
		}
	}


	if (strcmp(strA,strB)==0 )
		printf("YES");
	else
		printf("NO");

	return 0;
}