from datetime import datetime


def check_31(month, first, second) -> bool:
    day = second * 10 + first
    try:
        datetime(2015, month, day)
        return month == first + second
    except Exception:
        return False


def main():
    count = 0
    for month in range(1, 13):
        for second in range(0, 4):
            for first in range(0, 10):
                if second == first and second == 0:
                    continue
                if second == 3 and first == 1:
                    if check_31(month, first, second):
                        count += 1
                    break
                    
                day_sum = first + second
                if month < day_sum:
                    break
                if month == day_sum:
                    count += 1
    print(count)
    
    
if __name__ == '__main__':
    main()