17 пары соседних

data = open('17 (4).txt').readlines()
a = list(map(int, data))
cnt = 0
mx = -1
for i in range(len(a) - 1):
    if (a[i] * a[i + 1]) % 15 == 0 and (a[i] + a[i + 1]) % 7 == 0:
        cnt += 1
        mx = max(mx, a[i] + a[i + 1])
print(cnt, mx)