-al a-a a-c aaa aac aaf aal aas ac- aca acc acf acl acs af- afa afc aff afl afs al- ala alc alf all als as- asa asc asf asl ass c-- caa cac caf cal cas cca ccc ccf ccl ccs cfa cfc cff cfl cfs cl- cla clc clf cll cls csa csc csf csl css faa fac faf fal fas fca fcc fcf fcl fcs ffa ffc fff ffl ffs fla flc flf fll fls fsa fsc fsf fsl fss la- laa lac laf lal las lca lcc lcf lcl lcs lfa lfc lff lfl lfs lla llc llf lll lls lsa lsc lsf lsl lss saa sac saf sal sas sca scc scf scl scs sfa sfc sff sfl sfs sla slc slf sll sls ss- ssa ssc ssf ssl sss