# 3*27**9 + 2*27**6 + 27**3 - x

def kdigD(n, p, d):
    cnt = 0
    while n > 0:
        dig = n % p
        if dig == d:
            cnt += 1
        n //= p
    return cnt

for x in range(1, 27_000+1):
    n = 3*27**9 + 2*27**6 + 27**3 - x
    k0 = kdigD(n, 27, 0)
    if k0 == 6:
        ans = x
        break
print(ans)  # 27 ok