int main(int argc,char *argv[]){
    //freopen("data.txt","r",stdin);
    int n,i,key = 0,count = 0;
    char p[105],input[105];
    scanf("%d",&n);
    getchar();
    for(i = 0; i < n; i++){
        scanf("%c",&input[i]);
        getchar();
    }
    input[i] = '\0';
    strcpy(p,input);
    while(next_permutation(p,p+n)){
        if(strcmp(p,input) == 0){
            break;
        }
        else {
            count++;
            if(count >= 5){
                printf("Yes\n");
                return 0;
            }
        }
    }
    if(count >= 5){
        printf("Yes\n");
    }
    else {
        printf("No\n");
    }
}