a-a a-b a-i aaa aab aad aai aam aar ab- aba abb abd abi abm abr ad- ada adb add adi adm adr ai- aia aib aid aii aim air ama amb amd ami amm amr ar- ara arb ard ari arm arr baa bab bad bai bam bar bba bbb bbd bbi bbm bbr bda bdb bdd bdi bdm bdr bi- bia bib bid bii bim bir bma bmb bmd bmi bmm bmr bra brb brd bri brm brr daa dab dad dai dam dar dba dbb dbd dbi dbm dbr dda ddb ddd ddi ddm ddr di- dia dib did dii dim dir dma dmb dmd dmi dmm dmr dra drb drd dri drm drr i-d ia- iaa iab iad iai iam iar iba ibb ibd ibi ibm ibr ida idb idd idi idm idr iia iib iid iii iim iir im- ima imb imd imi imm ir- ira irb ird iri irm irr m-r maa mab mad mai mam mar mba mbb mbd mbi mbm mbr mda mdb mdd mdi mdm mdr mi- mia mib mid mii mim mir mma mmb mmd mmi mmm mmr mra mrb mrd mri mrm mrr ra- raa rab rad rai ram rar rba rbb rbd rbi rbm rbr rda rdb rdd rdi rdm rdr ria rib rid rii rim rir rma rmb rmd rmi rmm rmr rra rrb rrd rri rrm rrr