pch pcl pcn pco pcp pcr pcs pda pdc pdd pde pdh pdl pdn pdo pdp pdr pds pea pec ped pee peh pel pen peo pep per pes pha phc phd phe phl phn pho php phr phs pla plc pld ple plh pll pln plo plp plr pls pn- pna pnc pnd pne pnh pnl pnn pno pnp pnr pns poa poc pod poe poh pol pon poo pop por pos ppa ppc ppd ppe pph ppl ppn ppo ppp ppr pps pra prc prd pre prh prl prn pro prp prr prs ps- psa psc psd pse psh psl psn pso psp psr pss ra- raa rac rad rae rah ral ran rao rap rar ras rca rcc rcd rce rch rcl rcn rco rcp rcr rcs rda rdc rdd rde rdh rdl rdn rdo rdp rdr rds re- rea rec red ree reh rel ren reo rep rer res rh- rha rhc rhd rhe rhh rhl rhn rho rhp rhr rhs rla rlc rld rle rlh rll rln rlo rlp rlr rls rna rnc rnd rnh rnn rno rnp rnr rns roa roc rod roe roh rol ron roo rop ror ros rpa rpc rpd rpe rph rpl rpn rpo rpp rpr rps rra rrc rrd rrh rrl rrn rrp rrr rrs rsa rsc rsd rse rsh rsl rsn rso rsp rsr rss saa sac sad sae sah sal san sao sap sar sas sca scc scd sce sch scl scn sco scp scr scs sda sdc sdd sde sdh sdl sdn sdo sdp sdr sds se- sea sec sed see seh sel sen seo sep ser ses sh- sha shc shd she shh shl shn sho shp shr shs sla slc sld sle slh sll sln slo slp slr sls sna snc snd sne snl snn sno snp snr sns soa soc sod soe soh sol son soo sop sor sos spa spc spd spe sph spl spn spo spp spr sps sr- sra src srd sre srh srl srn sro srp srr srs ss- ssa ssc ssd sse ssh ssl ssn sso ssp ssr sss