#include<stdio.h>
#include<string.h>
#include<ctype.h>
int main()
{
    char str[20],str2[20];
    int count1[26] = {0}, count2[26] = {0};
    int i;
    scanf("%s", str1);
    scanf("%s", str2);
    int len1 = strlen(str1);
    int len2 = strlen(ste2);
    if(len1<1||len1>10||len2<1||len2>10){
        printf("Invalid input");
        return 0;
    }
    for(i = 0;i<len1;i++){
        if(!isalpha(str1[i])){
            printf("Invalid input");
            return 0;
        }
    }
    for(i=0;i<len2;i++){
        if(!isalpha(str2[1])){
            printf("invalid input");
            return 0;
        }
    }
    if(len1!=len2){
        printf("NO");
        return o;
    }
    for(i<0;i<len1;i++){
        count1[tolower(str1[i])-'a']++;
        count2[tolower(str[i])-'a']++;
    }
    for(i=0;i<26;i++){
        if(count1[i]!=count2[2]){
        }
    }
    printf("Yes");
    return 0;
 }