-er a-a a-c aaa aac aad aae aah aak aar ac- aca acc acd ace ach ack acr ad- ada adc add ade adh adk adr aea aec aed aee aeh aek aer aha ahc ahd ahe ahh ahk ahr aka akc akd ake akh akk akr ar- ara arc ard are arh ark arr c-- caa cac cad cae cah cak car cca ccc ccd cce cch cck ccr cda cdc cdd cde cdh cdk cdr ce- cea cec ced cee ceh cek cer ch- cha chc chd che chh chk chr cka ckc ckd ckh cra crc crd cre crh crk crr daa dac dad dae dah dak dar dca dcc dcd dce dck dcr dda ddc ddd dde ddh ddk ddr de- dea dec ded dee deh dek der dh- dha dhc dhd dhe dhh dhk dhr dka dkc dke dkk dkr dra drc drd dre drk drr eaa eac ead eae eah eak ear ec- eca ecc ecd ece ech eck ecr ed- eda edc edd ede edh edk edr eea eec eed eee eek eer eha ehc ehd ehe ehh ehr eka ekc ekd eke ekh ekr era erc erd ere erh erk err haa hac had hae hah hak har hca hcc hcd hce hch hck hcr hda hdc hdd hde hdh hdk hdr he- hea hec hed hee heh hek her hha hhc hhd hhe hhh hhk hhr hka hkd hkh hkk hkr hr- hra hrc hrd hre hrh hrk hrr ka- kaa kac kad kae kah kak kar kca kcc kcd kce kch kck kcr kda kdc kde kdh kdk kdr ke- kea kec ked kee keh kek ker kha khe khh khk khr kkc kke kkh kkk kkr kra krc krd krk krr ra- raa rac rad rae rah rak rar rca rcc rcd rce rch rcr rda rdc rdd rde rdh rdr re- rea rec red ree reh rek rer rh- rha rhc rhd rhe rhh rhr rkc rke rkk rra rrc rrd rrh rrk rrr