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

    if temp!=1:
        arr.append(temp)

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

    return arr
x,a,y,b=map(int,input().split())
if y==1:
    print("Yes")
    exit()
xlis=factorization(x)
ylis=factorization(y)
if len(set(xlis) & set(ylis))==len(ylis):
    print("Yes")
else:
    print("No")