b-u bbb bbi bbn bbs bbu bi- bib bii bin bis biu biz bnb bni bnn bns bnu bnz bsb bsi bsn bss bsu bub bui bun bus buu buz bzn bzs bzu bzz ibb ibi ibn ibs ibu ibz iib iii iin iis iiu in- inb ini inn ins inu is- isb isi isn iss isu iu- iub iui ius iuz izi izu izz n-i nbb nbi nbn nbs nbu nib nii nin nis niu niz nnb nni nnn nns nnu nnz nsb nsi nsn nss nsu nsz nub nui nun nus nuu nzb nzi nzs nzz sbb sbi sbn sbs sbu sib sii sin sis siu snb sni snn sns snu ss- ssb ssi ssn sss ssu ssz sub sui sun sus suu suz szi szu ubb ubi ubn ubs ubu uib uii uin uis uiu un- unb uni unn uns unu usb usi usn uss usu usz uun uus uuu uzb uzi uzu zbb zbs zib zin zis ziz znn zns zsi zsu zsz zub zui zun zus zuz zzs zzz