N9

def f(s, cnt):
    if s >= 43 and cnt - 1 == 2:
        return 1
    if s >= 43 and cnt - 1 < 2:
        return 0
    if s < 43 and cnt - 1 == 2:
        return 0

    A = f(s + 1, cnt + 1)
    B = f(s + 2, cnt + 1)
    C = f(s * 2, cnt + 1)
    if cnt % 2 == 0:
        return A or B or C
    else:
        return A and B and C

for s in range(43):
    A = f(s + 1, 0) or 2 * (s + 1) >= 43
    B = f(s + 2, 0) or 2 * (s + 2) >= 43
    C = f(s * 2, 0) or 4 * s >= 43
    if A and B and C:
        print(s)