#include <stdio.h>
#include <string.h>
#include <ctype.h>
#define MAX_LEN 11
int main()
{
    char str1[MAX_LEN], str2[MAX_LEN];
    if (scanf("%s %s", str1, str2) != 2) {
        printf("Invalid input\n");
        return 0;
    }
    int len1 = strlen(str1);
    int len2 = strlen(str2);
    if (len < 1 || len > 10 || len2 < 1 || len2 > 10) {
        printf("Invalid input\n");
        return 0;
    }
    for (int i = 0; i < len1; i++) {
        if(!isalpha(str1[i])) {
            printf("Invalid input\n");
            return 0;
        }
    }
    for (int i = 0; i < len2; i++) {
        if (!isalpha(str2[i])) {
            printf("Invalid input\n");
            return 0;
        }
    }
    if (len != len2) {
        printf("NO\n");
        return 0;
    }
    int count1[26] = {o}, count2[26] = {0};
    for (int i = 0; i < len1; i++) {
        count1[tolower(str1[i]) - 'a']++;
        count2[tolower(str2[i]) - 'a']++;
    }
    int is_anagram = 1;
    for (int i = 0; i < 26; i++) {
        if (count1[i] != count2[i]) {
            is_anagram = 0;
            break;
        }
    }
    if (is_anagram) {
        printf("YES\n");
    } else {
        printf("NO\n");
    }
    return 0;
}