bbb bbd bbf bbi bbs bdb bdd bdf bdi bds bfb bfd bff bfi bfs bi- bib bid bif bii bis bsb bsd bsf bsi bss dbb dbd dbf dbi dbs ddb ddd ddf ddi dds dfb dfd dff dfi dfs di- dib did dif dii dis dsb dsd dsf dsi dss fbb fbd fbf fbi fbs fdb fdd fdf fdi fds ffd fff ffi ffs fib fid fif fii fis fsb fsd fsf fsi fss i-d i-f ibb ibd ibf ibi ibs idb idd idf idi ids ifb ifd iff ifi ifs iib iid iif iii iis is- isb isd isf isi iss sbb sbd sbf sbi sbs sdb sdd sdf sdi sds sfb sfd sff sfi sfs sib sid sif sii sis ss- ssb ssd ssf ssi sss