a-a a-t aaa aaf aak aar aat aax af- afa aff afk afr aft afx aka akk akr ar- ara arf ark arr art arx at- ata atf atr att atx ax- axa axk axr axt axx faa faf fak far fat fax ffa fff ffk ffr fft ffx fka fkf fkk fkt fra frf frk frr frt fta ftf ftk ftr ftt ftx fxr fxt fxx k-t ka- kaa kaf kak kar kat kax kfa kff kfx kkk kkr kkt kra krf krk krr krt kta ktf ktk ktr ktt ra- raa raf rak rar rat rax rfa rff rfk rfr rft rkf rkk rkt rra rrf rrk rrr rrt rta rtf rtk rtr rtt rtx rxr t-x taa taf tak tar tat tax tfa tff tfk tfr tft tfx tka tkk tkr tkt tra trf trk trr trt trx tta ttf ttk ttr ttt ttx txf txk txt xaa xaf xak xar xat xfa xft xfx xrf xrt xrx xtf xtr xtx xxx