imp_r. repeattac (andM_l 1). orA_r1. andA_r. andM_r (2::3::nil). then orA_r1 orA_r2. then (andM_r (2::nil)) init. then orA_r2 init. then (copy 6) (then (lunfold_l 1) (then (dagger_l 1) (then (wall_l1 1 (w\w) 1) (at_l 1)))). imp_l 1 (3::4::nil). then orA_r1 orA_r2. then (andM_r (2::nil)) init. andM_l 1. then (down_l 2) (then (bang_l 2) (then (copy 1) (then (andA_l2 1) (imp_l 1 (3::nil))))). then at_r init. then (step_l 2) (then (down_l 2) (then (at_l 2) (then (at_l 1) (andM_l 2)))). then step_r (then down_r at_r). andM_r (1::3::nil). then (andM_r (1::nil)) init. init.