-al -er a-a a-b a-i aaa aab aae aaf aai aal aap aar aax ab- aba abb abe abf abi abl abp abr abx aea aeb aee aef aei ael aep aer aex af- afa afb afe aff afi afl afp afr afx ai- aia aib aie aif aii ail aip air aix al- ala alb ale alf ali all alp alr alx ap- apa apb ape apf api apl app apr apx ar- ara arb are arf ari arl arp arr arx ax- axa axe axi axl axp axr axx b-p baa bab bae baf bai bal bap bar bax bba bbb bbe bbf bbi bbl bbp bbr bbx be- bea beb bee bef bei bel bep ber bex bfa bfb bfe bff bfi bfl bfp bfr bfx bi- bia bib bie bif bii bil bip bir bix bla blb ble blf bli bll blp blr blx bpa bpb bpe bpf bpi bpl bpp bpr bpx bra brb bre brf bri brl brp brr brx bxb bxi bxl bxx eaa eab eae eaf eai eal eap ear eax eba ebb ebe ebf ebi ebl ebp ebr ebx eea eeb eee eef eel eep eer eex ef- efa efb efe eff efi efl efp efr efx eia eib eie eif eii eil eip eir eix ela elb ele elf eli ell elp elr elx ep- epa epb epe epf epi epl epp epr epx era erb ere erf eri erl erp err ex- exa exe exi exl exp exr exx faa fab fae faf fai fal fap far fax fba fbb fbe fbf fbi fbl fbp fbr fbx fea feb fee fef fei fel fep fer fex ffa ffe fff ffi ffl ffp ffr ffx fia fib fie fif fii fil fip fir fix fla flb fle flf fli fll flp flr flx fpa fpb fpe fpi fpl fpp fpr fpx fra frb fre frf fri frl frp frr fxe fxi fxp fxr fxx i-f ia- iaa iab iae iaf iai ial iap iar iba ibb ibe ibf ibi ibl ibp ibr ibx ie- iea iee ief iei iel iep ier iex ifa ifb ife iff ifi ifl ifp ifr ifx iia iib iie iif iii iil iip iir iix il- ila ilb ile ilf ili ill ilp ilr ilx ipa ipb ipe ipf ipi ipl ipp ipr ipx ir- ira irb ire irf iri irl irp irr irx ixe ixi ixl l-p la- laa lab lae laf lai lal lap lar lax lba lbb lbe lbf lbi lbl lbp lbr lbx lea leb lee lef lei lel lep ler lex lfa lfb lfe lff lfi lfl lfp lfr lfx lia lib lie lif lii lil lip lir lix lla llb lle llf lli lll llp llr lpa lpb lpe lpf lpi lpl lpp lpr lpx lra lrb lrf lri lrp lrr lxi lxr lxx p-p paa pab pae paf pai pal pap par pax pba pbb pbe pbf pbi pbl pbp pbr pbx pea peb pee pef pei pel pep per pex pfa pfb pfe pff pfi pfl pfp pfr pfx pia pib pie pif pii pil pip pir pix pla plb ple plf pli pll plp plr plx ppa ppb ppe ppf ppi ppl ppp ppr ppx pra prb pre prf pri prl prp prr prx pxe pxl pxr ra- raa rab rae raf rai ral rap rar rax rba rbb rbe rbf rbi rbl rbp rbr rbx re- rea reb ree ref rei rel rep rer rex rfa rfb rfe rff rfi rfl rfp rfr ria rib rie rif rii ril rip rir rix rla rle rlf rli rll rlp rlr rpa rpb rpe rpf rpi rpl rpp rpr rpx rra rrb rrf rri rrl rrp rrr rxp rxr xaa xaf xal xap xar xbe xbl xbr xbx xee xel xep xer xex xfa xfe xfl xfx xia xie xii xix xla xlb xlf xli xlr xpa xpb xpe xpf xpl xpp xrf xrx xxi xxl xxp xxx