-er a-a a-b a-i a-z aaa aab aad aae aag aai aar aaz ab- aba abb abd abe abg abi abr abz ad- ada adb add ade adg adi adr adz aea aeb aed aee aeg aei aer aez ag- aga agb agd age agg agi agr agz ai- aia aib aid aie aig aii air aiz ar- ara arb ard are arg ari arr arz az- aza azb azd aze azg azi azz baa bab bad bae bag bai bar baz bba bbb bbd bbe bbg bbi bbr bda bdb bdd bde bdg bdi bdr bdz be- bea beb bed bee beg bei ber bez bga bgb bgd bge bgg bgi bgr bgz bi- bia bib bid bie big bii bir biz bra brb brd bre brg bri brr brz bza bzd bze bzr bzz daa dab dad dae dag dai dar daz dba dbb dbd dbe dbg dbi dbr dbz dda ddb ddd dde ddg ddi ddr ddz de- dea deb ded dee deg dei der dez dga dgd dge dgg dgi dgr dgz di- dia dib did die dig dii dir diz dra drb drd dre drg dri drr drz dza dzb dzd dze dzi dzr eaa eab ead eae eag eai ear eaz eba ebb ebd ebe ebg ebi ebr ed- eda edb edd ede edg edi edr eea eeb eed eee eeg eer ega egb egd ege egg egi egr eia eib eid eie eig eii eir era erb erd ere erg eri err erz eze ezr ezz g-d gaa gab gad gae gag gai gar gaz gba gbd gbe gbg gbi gbr gbz gda gdb gdd gde gdi gdr ge- gea geb ged gee geg gei ger gez gga ggb ggd ggg ggi ggr ggz gia gib gid gie gig gii gir giz gra grb grd gre grg gri grr gza gzr i-d ia- iaa iab iad iae iag iai iar iaz iba ibb ibd ibe ibg ibi ibr ibz ida idb idd ide idg idi idr ie- iea ied iee ieg iei ier iga igb igd ige igg igi igr iia iib iid iie iii iir ir- ira irb ird ire irg iri irr iza ize izi izz ra- raa rab rad rae rag rai rar raz rba rbb rbd rbe rbg rbi rbr rda rdb rdd rde rdg rdi rdr re- rea reb red ree reg rei rer rez rga rgb rgd rge rgg rgi rgr ria rib rid rie rig rii rir riz rra rrb rrd rrg rri rrr rza rzb rze z-g zaa zab zad zag zai zar zaz zbb zbr zea zeb zed zee zer zez zgb zgg zgi zia zib zid zie zig zir ziz zzr zzz