month = [1,2,3,4,5,6,7,8,9,10,11,12]
days = [31,28,31,30,31,30,31,31,30,31,30,31]

count=0
for m in month:
    for day in range(1,days[m-1]+1):
        if m == day//10 + day%10:
            count+=1
print(count)