M = [1,2,3,4,5,6,7,8,9,10,11,12]
D = [[1,31], [1,28], [3,31], [4,30], [5,31], [6,30], [7,31], [8,31], [9,30], [10,31], [12,30], [12,31]]

cnt = 0

for x, y in zip(M, D):
  for i in range(y[0], y[1]):
    if x == i % 10 + i // 10:
      cnt += 1

print(cnt)