-up b-p b-u bbb bbd bbi bbp bbu bdb bdd bdi bdp bdu bi- bib bid bii bip biu bpb bpd bpi bpp bpu bub bud bui bup buu dbb dbd dbi dbp dbu ddb ddd ddi ddp ddu di- dib did dii dip diu dpb dpd dpi dpp dpu dub dud dui dup i-d ibb ibd ibi ibp ibu idb idd idi idp idu iib iid iii iip iiu ipb ipd ipi ipp ipu iu- iub iud iui iup p-p pbb pbd pbi pbp pbu pdb pdd pdi pdp pdu pib pid pii pip piu ppb ppd ppi ppp ppu pub pud pui pup puu ubb ubi ubp ubu udb udd udi udp udu uib uid uii uip uiu up- upb upd upi upp upu uuu