#月の日数
m_28 = 2
m_30 = [4,6,9,11]
m_31 = [1,3,5,7,8,10,12]
count = 0 # HAPPY DAYの数
for i in range (1,28):
    if 1 <= i <= 9:
        if i == 2:
            count += 1
    if 10 <= i:
        i = str(i)
        if int(i[0])+int(i[1]) == m_28:
            count +=1
for i in range (1,30):
    if 1 <= i <= 9:
        if i == 4 or 6 or 9:
            count += 1
    if 10 <= i:
        i = str(i)
        if int(i[0])+int(i[1]) == 4 or 6 or 9 or 11:
            count +=1
for i in range (1,31):
    if 1 <= i <= 9:
        if i == 1 or 3 or 5 or 7 or 8 :
            count += 1
    if 10 <= i:
        i = str(i)
        if int(i[0])+int(i[1]) == 1 or 3 or 5 or 7 or 8 or 10 or 12:
            count +=1
print(count)