for x in '0123456789abcdefghi':

x1 = '78' + x + '79643'

x2 = '25' + x + '43'

x3 = '63' + x + '5'

res = int(x1, 19) + int(x2, 19) + int(x3, 19)

if res % 18 == 0:

res = res // 18

print(res)

break

for num in range(15):

a = list(reversed([7, 8, num, 7, 9, 6, 4, 3]))

b = list(reversed([2, 5, num, 4, 3]))

c = list(reversed([6, 3, num, 5]))

for i in range(8):

a[i] = a[i] * 19 ** i

for i in range(5):

b[i] = b[i] * 19 ** i

for i in range(4):

c[i] = c[i] * 19 ** i

if (sum(a) + sum(b)+ sum(c)) % 18 == 0:

print((sum(a) + sum(b)+ sum(c)) // 18)

break