# include<stdio.h>
# include<string.h>
# include<ctype.h>
int main()
{
    char str1[11],str2[11];
    int count1[26]={0},count2[26]={0};
    scanf("%s",str1);
    scanf("%s",str2);
    int len1=strlen[str1);
    int len2=strlen(str2);
    if(len 1<1||len1>10||len2<1||len2>10){
        printf("Invalid input");
        return 0;
    }
    for(int i=0;i<len1;i++){
        ]if(!isalpha(str[i])){
            printf("Invalid input");
            return 0;
        }
    }
    for(int i=0;i<len2;i++){
        if(!isalpha(str2[i])){
            printf("Invalid input");
            return 0;
        }
    }
    if(len1=len2){
        printf("No");
        return 0;
    }
    for(int i=0;i<len1;i++){
        count1[tolower(str1[i])-'a']++;
        count2[tolower(str2[i])-'a']++;
    }
    for(int i=0;i<26;i++){
        if(count1[i]!=count2[i]){
            printf("No");
            return 0;
        }
    }
    printf("Yes");
    return 0;
}