a-ha aaaa aaab aaac aaah aaar aaba aabb aabc aabh aaca aacb aacc aach aacr aagh aaha aara aarc abaa abab abac abag abar abb- abba abbb abbr abca abcb abcc abch abcr abha abhr abra abrc acaa acab acac acag acar acba acca accc acch acga acgr acha achh achr acr- acra acrc acrr agac agag agar agba agca agcc agga agha agra ahab ahac ahah ahar ahha ahra ahrc ahrr arab arac arag arah arar arba arbh arc- arca arch arga argb argh arh- arr- arra arrc arrg arrh arrr baaa baah baar baba babb babr bac- baca bacc bach baga bagg bagh baha bahr bar- bara barb barc barg barh barr bbbb bbch bbga bbrc bbrg bcaa bcar bcbc bcbg bcca bccc bcra bgca bhag bhar bhca bhcc bhra brab brac brag brah brca brcb brrr caaa caab caac caah caba cabg cac- caca cacc cach cacr caga cagg cagr caha cara carb carc carr cbac cbar cbbc cbca cbcc cbcr cbga cbgb cbha cbrh ccaa ccab ccac ccag ccar ccba ccbc ccca cccb cccc ccga ccgc ccha cchr ccra ccrc ccrg cgac cgcc cgcg chaa chab chac chag chah char chca chch chgb chha chra chrb chrc chrr crab crac crag crar crbc crca crcc crcr gaar gaba gabb gabr gach gaga gagg gaha gara garb garg garr gbag gc-c gcaa gcbc gccc gcrg gggg gghg ghar grab grac grbr grcc grrr haab haag haar haba hag- haga hagg hagh haha hara harc harh harr hbag hbar hcbc hcca hccb hccc hcch hcgh hgah hgar hggc hhaa hhgg hhhh hrac hrrc raab raag raba rabb rac- raca racc rach raga ragg ragh raha rahr rara rarb rbbb rbbr rbgh rcac rcbc rccb rccc rcga rcgc rchb rcrg rgba rhag rhbg rhcg rrah rrrr