a-ha aaaa aaab aaac aaah aaap aaba aabb aabc aabh aabp aaca aacb aacc aach aaco aacp aaha aaoo aapa aapc aaph aapo abaa abab abac abap abb- abba abbb abbo abca abcb abcc abch abcp abha abho aboa abob aboh aboo abpa abpc abpp acaa acab acac acap acba acca accc acch acco accp acha achh acho achp acoa acoh acop acpa ahab ahac ahah ahha ahoa ahop aoah aoba aoca aopo apac apah apao apap apba apca apcb apcc apco aph- apha aphc apo- apoc apoo apop appa appc apph baaa baah baba babb babo bac- baca bacc bach baco baha baho baoh bapa bapc bapp bbbb bbch bcaa bcap bcbc bcbp bcca bccc bcpp bhao bhca bhcc boab boac boba bobb bobo boca boch boco boha boho boob booc booh boop bopa bopp bpcp bphc c-bo caaa caab caac caah caap caba cabo cac- caca cacc cach caco caha capa capb capc caph capo capp cbac cbbc cbca cbcc cbcp cbha cbpc cbpp ccaa ccab ccac ccap ccba ccbc ccca cccb cccc cccp ccha cchp ccob ccoc ccpa ccpp chaa chab chac chah chao chap chbp chca chch chcp chha choc choh choo chop chpa chpp coba cobb cobh cobo coca coch coco cocp coha coho coob cooh coop copa coph copo copp cpaa cpac cpap cpbc cpca cpha cppa haab haba habo haco haha haho hapa happ hboc hcap hcbc hcca hccb hccc hcch hcpc hhaa hhhh hhpa hhpc hoac hoap hoba hobo hoca hoch hoha hoho hoop hopa hopo hopp hpac hpao hpcc oahp oaph obba obbo ocab ocac ocap ocbc occa occc ocha ocpa ocpp ohba ohcc ohho ohob ohoh ooaa ooba ooha ooho oooh oooo opah opap opca opo- oppa oppo paap paba paca pach paco paha paho pahp paoc paoh papa papb papp pbac pbcc pboc pbpa pcaa pcap pcba pcbc pcca pccc pcha pchp pcoa pcpb pcpp phah phcc phob phoh phoo phpa poba pobo poca poch poco poha pooh poop pop- popa popc popo popp ppac ppap ppcc ppoa pppa pppo pppp