bbb bbd bbi bbk bbs bdb bdd bdi bdk bds bi- bib bid bii bik bis bkb bkk bks bsb bsd bsi bsk bss dbb dbd dbi dbk dbs ddb ddd ddi ddk dds di- dib did dii dik dis dkb dki dkk dks dsb dsd dsi dsk dss i-d ibb ibd ibi ibk ibs idb idd idi idk ids iib iid iii iis ikb iki ikk iks is- isb isd isi isk iss kbb kbd kbi kbk kbs kdb kdk kds kib kid kii kik kis kkb kki kkk kks ksb ksd ksi ksk kss sbb sbd sbi sbk sbs sdb sdd sdi sdk sds sib sid sii sik sis sk- skb skd ski skk sks ss- ssb ssd ssi ssk sss