-er a-a a-c aaa aac aad aae aaf aah aar ac- aca acc acd ace acf ach acr ad- ada adc add ade adf adh adr aea aec aed aee aef aeh aer af- afa afc afd afe aff afh afr aha ahc ahd ahe ahf ahh ahr ar- ara arc ard are arf arh arr c-- caa cac cad cae caf cah car cca ccc ccd cce ccf cch ccr cda cdc cdd cde cdf cdh cdr ce- cea cec ced cee cef ceh cer cfa cfc cfd cfe cff cfh cfr ch- cha chc chd che chf chh chr cra crc crd cre crf crh crr daa dac dad dae daf dah dar dca dcc dcd dce dcf dcr dda ddc ddd dde ddf ddh ddr de- dea dec ded dee def deh der dfa dfc dfd dfe dff dfh dfr dh- dha dhc dhd dhe dhf dhh dhr dra drc drd dre drr eaa eac ead eae eaf eah ear ec- eca ecc ecd ece ecf ech ecr ed- eda edc edd ede edf edh edr eea eec eed eee eef eer ef- efa efc efd efe eff efh efr eha ehc ehd ehe ehf ehh ehr era erc erd ere erf erh err faa fac fad fae faf fah far fca fcc fcd fce fcf fcr fda fdc fdd fde fdf fdh fdr fea fec fed fee fef feh fer ffa ffc ffd ffe fff ffh ffr fha fhc fhe fhf fhh fhr fra frc frd fre frf frh frr haa hac had hae haf hah har hca hcc hcd hce hcf hch hcr hda hdc hdd hde hdf hdh hdr he- hea hec hed hee hef heh her hfa hfc hfd hfe hff hfh hfr hha hhc hhd hhe hhf hhh hhr hr- hra hrc hrd hre hrf hrh hrr ra- raa rac rad rae raf rah rar rca rcc rcd rce rcf rch rcr rda rdc rdd rde rdf rdh rdr re- rea rec red ree ref reh rer rfa rfc rfd rfe rff rfh rfr rh- rha rhc rhd rhe rhf rhh rhr rra rrc rrd rrf rrh rrr