-er -up eee eef eel eep eer ef- efe eff efl efp efr ele elf ell elp elr elu ep- epe epf epl epp epr epu ere erf erl erp err eru eu- eue euf eul eup eur fee fef fel fep fer feu ffe fff ffl ffp ffr ffu fle flf fll flp flr flu fpe fpl fpp fpr fpu fre frf frl frp frr fru fue fuf ful fup fur fuu l-p lee lef lel lep ler leu lfe lff lfl lfp lfr lfu lle llf lll llp llr llu lpe lpf lpl lpp lpr lpu lrf lrp lrr lru lue luf lul lup lur luu p-p pee pef pel pep per peu pfe pff pfl pfp pfr pfu ple plf pll plp plr plu ppe ppf ppl ppp ppr ppu pre prf prl prp prr pru pue puf pul pup pur puu re- ree ref rel rep rer reu rfe rff rfl rfp rfr rfu rle rlf rll rlp rlr rlu rpe rpf rpl rpp rpr rpu rrf rrl rrp rrr rru rue ruf rup rur ruu uee uef uel uep uer ufe uff ufl ufp ufr ufu ule ulf ull ulp ulr ulu up- upe upf upp upr upu ur- ure urf url urp urr uru uue uur uuu