"""
2(28)
4(30)
6(30)
9(30)
11(30)
"""
month_28days=[2]
month_30days=[4,6,9,11]
month_31days=[1,3,5,7,8,10,12]


HAPPYDAYcount=0

a=[]
for i in range(1,10):
   a.append(i)
for i in range(10,29):
   a.append(int(i/10)+i-int(i/10)*10) 

for m in month_28days+month_30days+month_31days:
    for i in a:
        if i==m:
            HAPPYDAYcount+=1

b=[]
for i in range(29,31):
   b.append(int(i/10)+i-int(i/10)*10) 

for m in month_30days+month_31days:
    for i in b:
        if i==m:
            HAPPYDAYcount+=1

c=[4]

for m in month_31days:
    for i in c:
        if i==m:
            HAPPYDAYcount+=1


print(HAPPYDAYcount)