dic={
    'a':2, 'b':3, 'c':5, 'd':7, 'e':11, 'f':13, 'g':17, 'h':19, 'i':23, 'j':29, 'k':31,
    'l':37, 'm':41, 'n':43, 'o':47, 'p':53, 'q':59, 'r':61, 's':67, 't':71, 'u':73,
    'v':79, 'w':83, 'x':89, 'y':97, 'z':101
}

A=input()
B=input()

a=1
b=1

for i in range(len(A)):
    a *= dic[A[i]]
    b *= dic[B[i]]

if a==b:
    print("YES")

else:
    print("NO")