-up b-p b-u bbb bbi bbk bbp bbs bbu bi- bib bii bik bip bis biu bkb bkk bkp bks bpb bpi bpp bps bpu bsb bsi bsk bsp bss bsu bub bui buk bup bus buu ibb ibi ibk ibp ibs ibu iib iii iip iis iiu ikb iki ikk iks iku ipb ipi ipp ips ipu is- isb isi isk isp iss isu iu- iub iui iup ius kbb kbi kbk kbp kbs kbu kib kii kik kip kis kiu kkb kki kkk kkp kks kku kpi kpk kpp kps kpu ksb ksi ksk ksp kss ksu kub kui kuk kup kus kuu p-p pbb pbi pbk pbp pbs pbu pib pii pik pip pis piu pkb pki pkp pks pku ppb ppi ppk ppp pps ppu ps- psb psi psk psp pss psu pub pui puk pup pus puu sbb sbi sbk sbp sbs sbu sib sii sik sip sis siu sk- skb ski skk skp sks sku spb spi spk spp sps spu ss- ssb ssi ssk ssp sss ssu sub sui suk sup sus suu ubb ubi ubk ubp ubs ubu uib uii uip uis uiu ukb uki ukk ukp uku up- upb upi upk upp ups upu usb usi usk usp uss usu uus uuu