a-a a-b a-i a-z aaa aab aad aai aar aaz ab- aba abb abd abi abr abz ad- ada adb add adi adr adz ai- aia aib aid aii air aiz ar- ara arb ard ari arr arz az- aza azb azd azi azz baa bab bad bai bar baz bba bbb bbd bbi bbr bda bdb bdd bdi bdr bdz bi- bia bib bid bii bir biz bra brb brd bri brr brz bza bzd bzr bzz daa dab dad dai dar daz dba dbb dbd dbi dbr dbz dda ddb ddd ddi ddr ddz di- dia dib did dii dir diz dra drb drd dri drr drz dza dzb dzd dzi dzr i-d ia- iaa iab iad iai iar iaz iba ibb ibd ibi ibr ibz ida idb idd idi idr iia iib iid iii iir ir- ira irb ird iri irr iza izi izz ra- raa rab rad rai rar raz rba rbb rbd rbi rbr rda rdb rdd rdi rdr ria rib rid rii rir riz rra rrb rrd rri rrr rza rzb zaa zab zad zai zar zaz zbb zbr zia zib zid zir ziz zzr zzz