a-ak aaaa aaab aaap aaba aabb aabp aabt aaka aapa aapt aata aatk aatt abaa abab abak abap abat abb- abba abbb abbt abpa abpp abta akaa akap akka apak apap apat apba appa appt apta aptt at-t ataa atab atak atap atat atka atkt atta attp baaa baak baat baba babb bak- baka bakt bapa bapp bapt bata batt bbbb bkpt btaa btbp bttb kaaa kaab kaak kaap kaat kaba kabb kaka kakk kakt kap- kapa kapp kapt kat- kata katb katk katp katt kbaa kbab kbak kbap kbat kbba kbbb kbbk kbbt kbkb kbkk kbpa kbpk kbpt kbta kbtb kbtk kbtt kkaa kkap kkat kkba kkbb kkbt kkkk kkpk kkpt kktk kpak kpat kpba kpbb kpkk kppk kppp kptt ktaa ktak ktap ktat ktba ktbb ktbt ktkb ktkk ktkt ktpa ktpk ktpt kttk kttp kttt paak paap paat paba pabt paka papa papb papp pata patt pbpa pbpk ppap pppa pppp ppta pptt ptab ptak pttk taa- taat taba tabb taka takk takt tapa tapp tapt tata tatb tatt tbta tbtp tpap tppa tppp tptp ttab ttbb tttt