lst = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]

cnt = 0
for n, i in enumerate(lst):
  for j in range(i):
    a = j // 10
    b = j % 10
    if a + b == n + 1:
      cnt += 1

print(str(cnt))