#include<stdio.h>
#include<string.h>
#include<ctype.h>
void solve(){
    char str1[12];
    char str2[12];
    int count1[26]={0};
    int count2[26]={0};
    int len1,len2;
    int i;
    if (scanf("%11s",str1)!=1){
        printf("Invalid input");
        return;
    }
    if(scanf("%11s",str2)!=1){
        printf("Invalid input/n");
        return;
    }
    len1=strlen(str1);
    len2=strlen(str2);
    if(len1<1||len1>10||len2<1||len2>10){
        printf("Invalid input/n");
        return;
    }
    if(len1!=len2){
        printf("NO/n");
        return;
    }
    for(i=0;i<len1;i++){
        if(!isalpha(str1[i])){
            printf("Invalid input/n");
            return;
        }
        if(isupper(str1[i])){
            count1[str1[i]-'A']++;
        }else{
            count1[str[i]-'a']++;
        }
    }
    for(i=0;i<len2;i++){
        if(!isalpha(str2[i])){
            printf("Invalid input/n");
            return;
        }
        if(isupper(str2[i])){
            count2[str2[i]-'A']++;
        }else{
            count2[str2[i]-'a']++;
        }
    }
    for(i=0;i<26;i++){
        if(count1[i]!=count2[i]){
            printf("No/n");
            return;
        }
    }
    printf("YES/n");
}
int main()
    solve();
    return 0;
    }
})
        }
    }
        }
        }
        }
    }
        }
        }
        }
    }
    }
    }
    }
    }