-er a-a a-c aaa aac aad aae aah aap aar ac- aca acc acd ace ach acp acr ad- ada adc add ade adh adp adr aea aec aed aee aeh aep aer aha ahc ahd ahe ahh ahp ahr ap- apa apc apd ape aph app apr ar- ara arc ard are arh arp arr c-- caa cac cad cae cah cap car cca ccc ccd cce cch ccp ccr cda cdc cdd cde cdh cdp cdr ce- cea cec ced cee ceh cep cer ch- cha chc chd che chh chp chr cpa cpc cpd cpe cph cpp cpr cra crc crd cre crh crp crr daa dac dad dae dah dap dar dca dcc dcd dce dcp dcr dda ddc ddd dde ddh ddp ddr de- dea dec ded dee deh dep der dh- dha dhc dhd dhe dhh dhp dhr dpa dpc dpd dpe dph dpp dpr dra drc drd dre drp drr eaa eac ead eae eah eap ear ec- eca ecc ecd ece ech ecr ed- eda edc edd ede edh edp edr eea eec eed eee eep eer eha ehc ehd ehe ehh ehp ehr ep- epa epc epd epe eph epp epr era erc erd ere erh erp err haa hac had hae hah hap har hca hcc hcd hce hch hcp hcr hda hdc hdd hde hdh hdp hdr he- hea hec hed hee heh hep her hha hhc hhd hhe hhh hhp hhr hpa hpc hpd hpe hph hpp hpr hr- hra hrc hrd hre hrh hrp hrr p-p paa pac pad pae pah pap par pca pcc pcd pce pch pcp pcr pda pdc pdd pde pdh pdp pdr pea pec ped pee peh pep per pha phc phd phe php phr ppa ppc ppd ppe pph ppp ppr pra prc prd pre prh prp prr ra- raa rac rad rae rah rap rar rca rcc rcd rce rch rcp rcr rda rdc rdd rde rdh rdp rdr re- rea rec red ree reh rep rer rh- rha rhc rhd rhe rhh rhp rhr rpa rpc rpd rpe rph rpp rpr rra rrc rrd rrh rrp rrr