ans = 0

def sujiwa(n):
    if n/10 == 0:
        return n
    else:
        return (n/10) + n-(n/10)*10

for x in [4, 6, 9, 11]:
    for y in range(1, 31):
        if sujiwa(y) == x:
            ans += 1
            #print x, y

for x in [1, 3, 5, 7, 8, 10, 12]:
    for y in range(1, 32):
        if sujiwa(y) == x:
            ans += 1
            #print x, y

x = 2
for y in range(1, 29):
    if sujiwa(y) == x:
        ans += 1
        #print x, y
        
print ans