cnt=0
for m in range(1,13):

    for ten in range(10):
        one=m-ten
        dey=ten*10+one
        if one>=0 and one<10 :
            if (m in[1,3,5,7,8,10,12]) and dey<=31:
##                print(m,"月",dey,"日")
                cnt=-~cnt
            elif(m==2) and dey<=28:
##                print(m,"月",dey,"日")
                cnt=-~cnt
            elif dey<=30:
##                print(m,"月",dey,"日")
                cnt=-~cnt
            
print(cnt)