list_day = [31,28,31,30,31,30,31,31,30,31,30,31]
month = 0
date = 1
count = 0

def variable(x):
    if x < 10:
        var1 = 0
        var2 = x
    else:
        val1,val2 = str(x)
    D1 = int(val1)
    D2 = int(val2)
    D = (D1, D2)
    return D

def happyday(m,y,z):
    if m + 1 == y + z:
        count += 1
    return count

while month <= 11:
    while date <= list_day[month]:
        variable(date)
        happyday(month,D[0],D[1])
        date = date + 1
    month = month + 1
print(count)