-al a-a a-c aaa aac aaf aal aar ac- aca acc acf acl acr af- afa afc aff afl afr al- ala alc alf all alr ar- ara arc arf arl arr c-- caa cac caf cal car cca ccc ccf ccl ccr cfa cfc cff cfl cfr cl- cla clc clf cll clr cra crc crf crl crr faa fac faf fal far fca fcc fcf fcl fcr ffa ffc fff ffl ffr fla flc flf fll flr fra frc frf frl frr la- laa lac laf lal lar lca lcc lcf lcl lcr lfa lfc lff lfl lfr lla llc llf lll llr lra lrc lrf lrr ra- raa rac raf ral rar rca rcc rcf rcl rcr rfa rfc rff rfl rfr rla rlc rlf rll rlr rra rrc rrf rrl rrr