#include <iostream>
#include <string>

int main() {
    std::string A, B;
    int check[10] = { 0 };
    int match = 0;

    std::cin >> A >> B;
    
    int N = A.size();
    
    for (int i=0; i<N; i++) {
        for (int j=0; j<N; j++) {
            if (check[j]==1) continue;
            
            if (A[i] == B[j]) {
                check[j] = 1;
                match += 1;
                break;
            }
        }
    }
    
    if (match == N)
        std::cout << "YES" << std::endl;
    else
        std::cout << "NO" << std::endl;

	return 0;
}