Challenging exercises Jaa Sulje 3/02. Exercise 2.19 Avaa lomake 3/02. Exercise 2.20 Avaa lomake 3/02. Exercise 2.21 Avaa lomake 3/02. Exercise 2.22 Avaa lomake 3/02. Exercise 2.23 Avaa lomake 3/02. Exercise 2.24 Avaa lomake 3/02. Exercise 2.25 Avaa lomake
