( 2π2 . (2π1.2π1,+.(id.2π1.2π2,id.2π2.2π2)o.(2π1.2π1,(2π2.2π1,2π2.2π2)o)o)o / . distl . (id,++.(b_allvec[0]o,(b_if(<.(2π2,0)o,-.(0,2π2)o,2π2).(id,-.(2π2.2π1,2π2)o)o)*.distl.(id,id.2π1)o)o)o . id . id . id . id )* . distl . (id,id)o . id . id . id