# ((x ≤ 9) →(x ⋅ x ≤ A)) ⋀ ((y ⋅ y ≤ A) → (y ≤ 9))

def OK(x, y, A):
    return (not(x <= 9) or (x * x <= A)) and (not (y * y <= A) or (y <= 9))

for A in range(1, 1000):
    flag = 0
    for x in range(0, 1000):
        for y in range(0, 1000):
            if OK(x, y, A) == False:
                flag = 1
                break
        if flag == 1:
            break
    if flag == 0:
        print(A)