# -*- coding: utf-8 -*-

def sum_day(n):
    a = "{:02}".format(n)
    return int(a[0]) + int(a[1])


def main():
    month = range(12)
    day = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
    c = list()
    counter = 0
    t = list()
    for i in month:
        c.append((i + 1, range(1, day[i] + 1)))
    for m, ds in c:
        for d in ds:
            if m == sum_day(d):
                counter += 1
    print(counter)

if __name__ == '__main__':
    main()