a-a a-c aaa aac aad aan aap aar ac- aca acc acd acn acp acr ad- ada adc add adn adp adr an- ana anc and ann anp anr ap- apa apc apd apn app apr ar- ara arc ard arn arp arr c-- caa cac cad can cap car cca ccc ccd ccn ccp ccr cda cdc cdd cdn cdp cdr cn- cna cnc cnd cnn cnp cnr cpa cpc cpd cpn cpp cpr cra crc crd crn crp crr daa dac dad dan dap dar dca dcc dcd dcn dcp dcr dda ddc ddd ddn ddp ddr dna dnc dnd dnn dnp dnr dpa dpc dpd dpn dpp dpr dra drc drd drn drp drr naa nac nad nan nap nar nca ncc ncd ncn ncp ncr nda ndc ndd ndn ndp ndr nna nnc nnn nnp npa npc npd npn npp npr nra nrc nrd nrn nrp nrr p-p paa pac pad pan pap par pca pcc pcd pcn pcp pcr pda pdc pdd pdn pdp pdr pn- pna pnc pnd pnn pnp pnr ppa ppc ppd ppn ppp ppr pra prc prd prn prp prr ra- raa rac rad ran rap rar rca rcc rcd rcn rcp rcr rda rdc rdd rdn rdp rdr rna rnc rnd rnn rnp rnr rpa rpc rpd rpn rpp rpr rra rrc rrd rrn rrp rrr