#include <stdio.h>
#include<string.h>
#include <ctype.h>
int main()
{
    char str1[20],str[20];
    int count1[26] = {0}, count2[26] = {0};
    int i;
    scanf("%s", str1);
    scanf("%s", str2);
    int len1 = strlen(str1);
    int len2 = strlen(str2);
    if(len1<1||len1>10||len2<1|| len>10)
    {
        printf("Invlaid input");
        return 0;
    }
    for(i =0;i<len1;i++)
    {
        if(!isalpha(str1[i]))
        {
            printf("Invalid input");
            return 0;
        }
    }
    for(i=0;i<len1;i++)
    {
        if(!isalpha(str1[i]))
        {
            printf("Invalid input");
            return0;
        }
    }
    for(i=0;i<len2;i++)
    {
        if(!isalpha(str2[i])){
            printf("Invalid input");
            return 0;
        }
    }
    for (i =0;i<len1;i++)
    {
        count1[tolower(str1[i])-'a']++;
        count2[tolower(str2[i])-'a']++;
        }
        for (i=0;i<26;i++)
        {
            if(count1[i]!=count2[i])
            {
                printf("NO");
                return 0;
            }
        }
        printf("YES");
        return 0;
}