def main():
    a = list(input())
    b = list(input())

    print(a)
    i = 0
    j = 0

    while i < len(a):

        if len(b) == 0:
            print("YES")
            break
        while j < len(b):
            if a[i] == b[j]:
                a.pop(i)
                b.pop(j)
                break
            j += 1
        i += 1
    if len(b) != 0:
        print("NO")


if __name__ == "__main__":
    main()