# 1

for i in range(10,99+1):

   if i % 21 == 0:

       print(i)

# 2

pr = 1

for i in range(11, 37+1):

   if i % 2 != 0:

       pr *= i

print(pr)

# 3

summ = 0

for i in range(17, 40+1):

   if i % 2 != 0 and i % 7 != 0:

       summ += i

       print(i)

print(summ)