pfp pfr pfs phc phe phf phi phl phn pho php phr phs pic pie pif pih pii pil pin pio pip pir pis plc ple plf plh pli pll pln plo plp plr pls pn- pnc pne pnf pnh pni pnl pnn pno pnp pnr pns poc poe pof poh poi pol pon poo pop por pos ppc ppe ppf pph ppi ppl ppn ppo ppp ppr pps prc pre prf prh pri prl prn pro prp prr prs ps- psc pse psf psh psi psl psn pso psp psr pss rcc rce rcf rch rci rcl rcn rco rcp rcr rcs re- rec ree ref reh rei rel ren reo rep rer res rfc rfe rff rfh rfi rfl rfn rfo rfp rfr rfs rh- rhc rhe rhf rhh rhi rhl rhn rho rhp rhr rhs ric rie rif rih rii ril rin rio rip rir ris rlc rle rlf rlh rli rll rln rlo rlp rlr rls rnc rnh rni rnn rno rnp rnr rns roc roe rof roh roi rol ron roo rop ror ros rpc rpe rpf rph rpi rpl rpn rpo rpp rpr rps rrc rrf rrh rri rrl rrn rrp rrr rrs rsc rse rsf rsh rsi rsl rsn rso rsp rsr rss scc sce scf sch sci scl scn sco scp scr scs se- sec see sef seh sei sel sen seo sep ser ses sfc sfe sff sfh sfi sfl sfn sfo sfp sfr sfs sh- shc she shf shh shi shl shn sho shp shr shs sic sie sif sih sii sil sin sio sip sir sis slc sle slf slh sli sll sln slo slp slr sls snc sne snf sni snl snn sno snp snr sns soc soe sof soh soi sol son soo sop sor sos spc spe spf sph spi spl spn spo spp spr sps sr- src sre srf srh sri srl srn sro srp srr srs ss- ssc sse ssf ssh ssi ssl ssn sso ssp ssr sss