a-a a-i aaa aad aaf aai aak aas ad- ada add adf adi adk ads af- afa afd aff afi afk afs ai- aia aid aif aii aik ais aka akd aki akk aks as- asa asd asf asi ask ass daa dad daf dai dak das dda ddd ddf ddi ddk dds dfa dfd dff dfi dfk dfs di- dia did dif dii dik dis dka dki dkk dks dsa dsd dsf dsi dsk dss faa fad faf fai fak fas fda fdd fdf fdi fdk fds ffa ffd fff ffi ffk ffs fia fid fif fii fik fis fka fkf fki fkk fsa fsd fsf fsi fsk fss i-d i-f ia- iaa iad iaf iai ias ida idd idf idi idk ids ifa ifd iff ifi ifs iia iid iif iii iis ika ikf iki ikk iks is- isa isd isf isi isk iss ka- kaa kad kaf kai kak kas kda kdf kdk kds kfa kfd kff kfi kfs kia kid kif kii kik kis kki kkk kks ksa ksd ksf ksi ksk kss saa sad saf sai sak sas sda sdd sdf sdi sdk sds sfa sfd sff sfi sfk sfs sia sid sif sii sik sis sk- ska skd skf ski skk sks ss- ssa ssd ssf ssi ssk sss