-up fff ffn ffo ffp ffr ffu fnf fnn fnp fnr fnu fof fon foo fop for fou fpn fpo fpp fpr fpu frf frn fro frp frr fru fuf fun fuo fup fur fuu nff nfn nfo nfp nfr nfu nnf nnn nno nnp nnu no- nof non noo nop nor nou npf npn npo npp npr npu nrf nrn nro nrp nrr nru nun nuo nup nur nuu of- off ofn ofo ofp ofr ofu on- onf onn ono onp onr onu oo- oof oon ooo oop oor op- opf opn opo opp opr or- orf orn oro orp orr oru ou- ouf oun ouo oup our p-p pff pfn pfo pfp pfr pfu pn- pnf pnn pno pnp pnr pnu pof pon poo pop por pou ppf ppn ppo ppp ppr ppu prf prn pro prp prr pru puf pun pup pur puu rff rfn rfo rfp rfr rfu rnn rno rnp rnr rnu rof ron roo rop ror rou rpf rpn rpo rpp rpr rpu rrf rrn rrp rrr rru ruf run ruo rup rur ruu uff ufn ufo ufp ufr ufu un- unf unn uno unp unr unu uon uoo uop uor up- upf upn upo upp upr upu ur- urf urn uro urp urr uru uun uur uuu