days = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
happy_count = 0

for i, day in enumerate(days):
    for j in range(day):
        a = j % 10
        b = j // 10
        
        if (a + b) == (i + 1):
            happy_count += 1
            
print(happy_count)