a-a a-c aaa aac aad aao aap aar ac- aca acc acd aco acp acr ad- ada adc add ado adp adr aoa aoc aod aoo aop aor ap- apa apc apd apo app apr ar- ara arc ard aro arp arr c-- caa cac cad cao cap car cca ccc ccd cco ccp ccr cda cdc cdd cdo cdp cdr co- coa coc cod coo cop cor cpa cpc cpd cpo cpp cpr cra crc crd cro crp crr daa dac dad dao dap dar dca dcc dcd dco dcp dcr dda ddc ddd ddo ddp ddr doa doc dod doo dop dor dpa dpc dpd dpo dpp dpr dra drc drd dro drp drr oaa oac oad oao oap oar oc- oca occ ocd oco ocp ocr oda odc odd odo odp odr oo- ooa ooc ood ooo oop oor op- opa opc opd opo opp opr or- ora orc ord oro orp orr p-p paa pac pad pao pap par pca pcc pcd pco pcp pcr pda pdc pdd pdo pdp pdr poa poc pod poo pop por ppa ppc ppd ppo ppp ppr pra prc prd pro prp prr ra- raa rac rad rao rap rar rca rcc rcd rco rcp rcr rda rdc rdd rdo rdp rdr roa roc rod roo rop ror rpa rpc rpd rpo rpp rpr rra rrc rrd rrp rrr