https://disco.ethz.ch/courses/fs12/podc/exams/podc_exam_2009.pdf

... a t r l oes " te l r r r i r ra t i ou ' ' r r rea r l f b t ' c l i s t r i l r t t t c t l i t l ... a t r l oes " te l r r r i r ra t i ou ' ' r r rea r l f b t ' c l i s t r i l r t t t c t l i t l ...