a-be a-ha aaaa aaab aaac aaae aaah aaar aaba aabb aabc aabh aaca aacb aacc aace aach aacr aaea aaec aaha aara aarc aare abaa abab abac abae abar abb- abba abbb abbe abbr abca abcb abcc abch abcr abec abee aber abha abhr abra abrc acaa acab acac acae acar acba acca accc acce acch ace- acea acec aceh acer acha ache achh achr acr- acra acrc acre acrr aeac aecb aeer aer- aera aerc ahab ahac ahah ahar ahha ahra ahrc ahre ahrr arab arac arae arah arar arba arbe arbh arc- arca arce arch area arec aree areh arh- arr- arra arrc arre arrh arrr baaa baah baar baba babb babe babr bac- baca bacc bace bach baer baha bahr bar- bara barb barc bare barh barr bbbb bbch bbeb bbrc bcaa bcar bcbc bcca bccc bcec bcer bche bcra beah bear beba bebb bebe beca bech beeb beer behr bera berc bere berr bhar bhca bhcc bher bhra brab brac brae brah brca brcb brce brea breb brec bree brer brrr caaa caab caac caah caba cabe cac- caca cacc cace cach cacr caec caer caha cahe cara carb carc care carr cbac cbar cbbc cbca cbcc cbce cbcr cbea cbec cbee cber cbha cbre cbrh ccaa ccab ccac ccar ccba ccbc ccca cccb cccc ccee ccha cche cchr ccra ccrc ccre ceac cear ceba cec- ceca cece ceeb ceec cer- cera cerc cere chaa chab chac chae chah char chca chce chch chea cheb chec chee cheh cher chha chra chrb chrc chrr crab crac crar crbc crca crcc crce crcr cre- crea creb crec cree creh eaba eabh eaca eacc each eaec eara earb eare earh ebac ebba ebbc ebbr ebcc eber ecaa ecac ecar ecbc ecbe ecca eccb eccc ecce echa eche ecra ecrc ecrr eeca eeea eeee eera eerc ehaa ehcc ehea eheh eher ehre erba erbb erbe erca ercc erce erch ereb erec erer erhc erra errc erre haab haar haba habe hace haec haha hara harc hare harh harr hbar hcbc hcca hccb hccc hcch heah hear hebb hebe hebr heca hech heeb heer hehe hera herb herc here herr hhaa hhhh hrac hree hrrc raab raba rabb rabe rac- raca racc race rach raec raer raha rahe rahr rara rarb rare rbbb rbbr rcac rcbc rccb rccc rchb rea- reac reae rear reba rebb rebe reca recc rece rech recr reeb reha rehb rehe rera rere rhae rhce rhea rheb rhee rrah rrrr