A = input()
B = input()

flag = True
for i in range(len(A)):
    if flag == True:
        for j in range(len(B)):
            if A[i] == B[j]:
                s = list(B)
                s[j] = " "
                B = "".join(s)
                break
            if j == len(B) - 1:
                flag = False
                break

if flag == False:
    print("NO")
else:
    print("YES")