def factorization(n):
    arr = []
    temp = n
    for i in range(2, int(-(-n**0.5//1))+1):
        if temp%i==0:
            cnt=0
            while temp%i==0:
                cnt+=1
                temp //= i
            arr.append([i, cnt])

    if temp!=1:
        arr.append([temp, 1])

    if arr==[]:
        arr.append([n, 1])

    return arr
x,a,y,b=map(int,input().split())
xlis=factorization(x)
ylis=factorization(y)
for i in xlis:
    for j in ylis:
        if i[0]==j[0]:
            print("Yes")
            exit()
print("No")