-al -er a-a a-b a-i aaa aab aae aai aal aap aar aax ab- aba abb abe abi abl abp abr abx aea aeb aee aei ael aep aer aex ai- aia aib aie aii ail aip air aix al- ala alb ale ali all alp alr alx ap- apa apb ape api apl app apr apx ar- ara arb are ari arl arp arr arx ax- axa axe axi axl axp axr axx b-p baa bab bae bai bal bap bar bax bba bbb bbe bbi bbl bbp bbr bbx be- bea beb bee bei bel bep ber bex bi- bia bib bie bii bil bip bir bix bla blb ble bli bll blp blr blx bpa bpb bpe bpi bpl bpp bpr bpx bra brb bre bri brl brp brr brx bxb bxi bxl bxx eaa eab eae eai eal eap ear eax eba ebb ebe ebi ebl ebp ebr ebx eea eeb eee eel eep eer eex eia eib eie eii eil eip eir eix ela elb ele eli ell elp elr elx ep- epa epb epe epi epl epp epr epx era erb ere eri erl erp err ex- exa exe exi exl exp exr exx ia- iaa iab iae iai ial iap iar iba ibb ibe ibi ibl ibp ibr ibx ie- iea iee iei iel iep ier iex iia iib iie iii iil iip iir iix il- ila ilb ile ili ill ilp ilr ilx ipa ipb ipe ipi ipl ipp ipr ipx ir- ira irb ire iri irl irp irr irx ixe ixi ixl l-p la- laa lab lae lai lal lap lar lax lba lbb lbe lbi lbl lbp lbr lbx lea leb lee lei lel lep ler lex lia lib lie lii lil lip lir lix lla llb lle lli lll llp llr lpa lpb lpe lpi lpl lpp lpr lpx lra lrb lri lrp lrr lxi lxr lxx p-p paa pab pae pai pal pap par pax pba pbb pbe pbi pbl pbp pbr pbx pea peb pee pei pel pep per pex pia pib pie pii pil pip pir pix pla plb ple pli pll plp plr plx ppa ppb ppe ppi ppl ppp ppr ppx pra prb pre pri prl prp prr prx pxe pxl pxr ra- raa rab rae rai ral rap rar rax rba rbb rbe rbi rbl rbp rbr rbx re- rea reb ree rei rel rep rer rex ria rib rie rii ril rip rir rix rla rle rli rll rlp rlr rpa rpb rpe rpi rpl rpp rpr rpx rra rrb rri rrl rrp rrr rxp rxr xaa xal xap xar xbe xbl xbr xbx xee xel xep xer xex xia xie xii xix xla xlb xli xlr xpa xpb xpe xpl xpp xrx xxi xxl xxp xxx