Challenging exercises Jaa Sulje 1/12. Exercise 12.19 Avaa lomake 1/12. Exercise 12.20 Avaa lomake 1/12. Exercise 12.21 Avaa lomake 1/12. Exercise 12.22 Avaa lomake 1/12. Exercise 12.23 Avaa lomake 1/12. Exercise 12.24 Avaa lomake 1/12. Exercise 12.25 Avaa lomake 1/12. Exercise 12.26 Avaa lomake 1/12. Exercise 12.27 Avaa lomake