def f(n):
    s = ''
    while n > 0:
        s += str(n % 19)
        n //= 19
    s = s[::-1]
    return s
M = 0
for x in range(1, 20):
    a = 9 * 19**7 + 8 * 19**6 + x * 19**5 + 7 * 19**4 + 9 * 19**3 + 6 * 19**2 + 4 * 19 + 1
    b = 3 * 19**4 + 6 * 19**3 + x * 19**2 + 19 + 4
    c = 7 * 19**3 + 3 * 19**2 + x * 19 + 4
    if a + b + c % 18 == 0:
        M = max(M, x)

A = 9 * 19**7 + 8 * 19**6 + M * 19**5 + 7 * 19**4 + 9 * 19**3 + 6 * 19**2 + 4 * 19 + 1
B = 3 * 19**4 + 6 * 19**3 + M * 19**2 + 19 + 4
C = 7 * 19**3 + 3 * 19**2 + M * 19 + 4
print((A + B + C) // 18)