#include    <stdio.h>
#include    <string.h>

int main(void)
{
    char    A[16];
    char    B[16];
    int     i;
    int     sumA = 0;
    int     sumB = 0;

    memset(A, '\0', sizeof(A));
    memset(B, '\0', sizeof(A));
    scanf("%s", A);
    scanf("%s", B);

    for (i = 0; i < strlen(A); i++) {
        sumA += A[i];
        sumB += B[i];
    }

    if (sumA == sumB) {
        printf("YES\n");
    } else {
        printf("NO\n");
    }

    return 0;
}