#include<stdio.h>
main(){
    char A[11],B[11];
    int count[26];
    scanf("%s%s",A,B);
    for(int i = 0;i < 26;i++){
        count[i] = 0;
    }
    for(int i = 0;A[i] != '\0';i++){
        count[A[i] - 'a']++;
    }
    for(int i = 0;B[i] != '\0';i++){
        count[B[i] - 'a']--;
    }
    for(int i = 0;i < 26;i++){
        if(count[i] != 0){
            printf("NO\n");
            return 0;
        }
    }
    printf("YES\n");
}