A = []
B = []

for i in range(31):

    j = i + 1
    A.append( int(j/10) + j - int(j/10) * 10 )

for i in range(30):

    j = i + 1
    B.append( int(j/10) + j - int(j/10) * 10 )

print( A.count(1) + A.count(3) + A.count(5) + A.count(7) + A.count(8) + A.count(10) +A.count(12) + B.count(2) + B.count(4) + B.count(6) + B.count(9) + B.count(11) )