#include<stdio.h>

int main(void){

	char str1[11],str2[11];
	int alpha[26] = {0};
	int check = 0;

	scanf("%s %s",str1,str2);

	for(int i = 0;str1[i] != '\0';i++){
		alpha[str1[i]-'a']++;
	}

	for(int i = 0;str2[i] != '\0';i++){
		alpha[str2[i]-'a']--;
	}

	for(int i = 0;i < 26;i++){
		if(alpha[i] != 0){
			check++;
		}
	}

	if(check == 0){
		printf("YES\n");
	}else{
		printf("NO\n");
	}

	return 0;
}