-er a-a a-b a-i a-z aaa aab aad aae aai aap aar aaz ab- aba abb abd abe abi abp abr abz ad- ada adb add ade adi adp adr adz aea aeb aed aee aei aep aer aez ai- aia aib aid aie aii aip air aiz ap- apa apb apd ape api app apr ar- ara arb ard are ari arp arr arz az- aza azb azd aze azi azp azz b-p baa bab bad bae bai bap bar baz bba bbb bbd bbe bbi bbp bbr bda bdb bdd bde bdi bdp bdr bdz be- bea beb bed bee bei bep ber bez bi- bia bib bid bie bii bip bir biz bpa bpb bpd bpe bpi bpp bpr bra brb brd bre bri brp brr brz bza bzd bze bzp bzr bzz daa dab dad dae dai dap dar daz dba dbb dbd dbe dbi dbp dbr dbz dda ddb ddd dde ddi ddp ddr ddz de- dea deb ded dee dei dep der dez di- dia dib did die dii dip dir diz dpa dpb dpd dpe dpi dpp dpr dpz dra drb drd dre dri drp drr drz dza dzb dzd dze dzi dzp dzr eaa eab ead eae eai eap ear eaz eba ebb ebd ebe ebi ebp ebr ed- eda edb edd ede edi edp edr eea eeb eed eee eep eer eia eib eid eie eii eip eir ep- epa epb epd epe epi epp epr epz era erb erd ere eri erp err erz eze ezr ezz i-d ia- iaa iab iad iae iai iap iar iaz iba ibb ibd ibe ibi ibp ibr ibz ida idb idd ide idi idp idr ie- iea ied iee iei iep ier iia iib iid iie iii iip iir ipa ipb ipd ipe ipi ipp ipr ir- ira irb ird ire iri irp irr iza ize izi izz p-p paa pab pad pae pai pap par paz pba pbb pbd pbe pbi pbp pbr pbz pda pdb pdd pde pdi pdp pdr pdz pea peb ped pee pei pep per pez pia pib pid pie pii pip pir piz ppa ppb ppd ppe ppi ppp ppr ppz pra prb prd pre pri prp prr prz pzp ra- raa rab rad rae rai rap rar raz rba rbb rbd rbe rbi rbp rbr rda rdb rdd rde rdi rdp rdr re- rea reb red ree rei rep rer rez ria rib rid rie rii rip rir riz rpa rpb rpd rpe rpi rpp rpr rpz rra rrb rrd rri rrp rrr rza rzb rze zaa zab zad zai zap zar zaz zbb zbr zea zeb zed zee zep zer zez zia zib zid zie zip zir ziz zpe zpi zpp zpr zrp zzr zzz