a-a a-t aaa aaf aag aak aar aat af- afa aff afg afk afr aft ag- aga agf agg agk agr agt aka akg akk akr ar- ara arf arg ark arr art at- ata atf atg atr att faa faf fag fak far fat ffa fff ffg ffk ffr fft fga fgf fgg fgr fgt fka fkf fkg fkk fkt fra frf frg frk frr frt fta ftf ftg ftk ftr ftt gaa gaf gag gak gar gat gfa gff gfk gfr gft gga ggg ggr ggt gka gkt gra grf grg grk grr grt gta gtf gtg gtk gtr gtt k-t ka- kaa kaf kag kak kar kat kfa kff kfg kga kgf kkk kkr kkt kra krf krg krk krr krt kta ktf ktg ktk ktr ktt ra- raa raf rag rak rar rat rfa rff rfg rfk rfr rft rga rgf rgg rgk rgr rgt rkf rkg rkk rkt rra rrf rrg rrk rrr rrt rta rtf rtg rtk rtr rtt taa taf tag tak tar tat tfa tff tfg tfk tfr tft tga tgf tgg tgk tgr tgt tka tkg tkk tkr tkt tra trf trg trk trr trt tta ttf ttg ttk ttr ttt