m = [i+1 for i in range(12)]
d = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]

c = 0
for i in range(12):
    for j in range(d[i]):
        z = ('{:0=2}'.format(j+1))
        x = int(z[0])
        y = int(z[1])
        if m[i] == x + y:
            c += 1
print(c)