import datetime

start_str = '2015-01-01 0:0:0'
end_str = '2015-12-31 0:0:0'

start_tdatetime = datetime.datetime.strptime(start_str, '%Y-%m-%d %H:%M:%S')
start_tdate = datetime.date(start_tdatetime.year, start_tdatetime.month, start_tdatetime.day)

end_tdatetime = datetime.datetime.strptime(end_str, '%Y-%m-%d %H:%M:%S')
end_tdate = datetime.date(end_tdatetime.year, end_tdatetime.month, end_tdatetime.day)

# print(start_tdate)
# print(end_tdate)

count = 0

for i in range((end_tdate - start_tdate).days + 1):
    date = start_tdate + datetime.timedelta(days=i)
    if(date.month == date.day % 10 + date.day // 10):
        # print(date)
        count += 1

print(count)