a-a a-b a-i a-z aaa aab aad aai aap aaz ab- aba abb abd abi abp abz ad- ada adb add adi adp adz ai- aia aib aid aii aip aiz ap- apa apb apd api app az- aza azb azd azi azp azz b-p baa bab bad bai bap baz bba bbb bbd bbi bbp bda bdb bdd bdi bdp bdz bi- bia bib bid bii bip biz bpa bpb bpd bpi bpp bza bzd bzp bzz daa dab dad dai dap daz dba dbb dbd dbi dbp dbz dda ddb ddd ddi ddp ddz di- dia dib did dii dip diz dpa dpb dpd dpi dpp dpz dza dzb dzd dzi dzp i-d ia- iaa iab iad iai iap iaz iba ibb ibd ibi ibp ibz ida idb idd idi idp iia iib iid iii iip ipa ipb ipd ipi ipp iza izi izz p-p paa pab pad pai pap paz pba pbb pbd pbi pbp pbz pda pdb pdd pdi pdp pdz pia pib pid pii pip piz ppa ppb ppd ppi ppp ppz pzp zaa zab zad zai zap zaz zbb zia zib zid zip ziz zpi zpp zzz