#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>

int main()
{
	char str[11] = "";
	char ansStr[11] = "";
	int  check[10] = { 0 };

	scanf("%s", str);
	scanf("%s", ansStr);

	for (int i = 0;str[i] != '\0';i++)
	{
		bool isOk = false;
		for (int j = 0;str[j] != '\0';j++)
		{
			if (str[i] == ansStr[j] && check[j] == 0)
			{
				isOk = true;
				check[j] = 1;
				break;
			}
		}
		if (!isOk)
		{
			printf("NO\n");
			return 0;
		}
	}

	printf("YES\n");
	return 0;
}