a-a a-b a-c aaa aab aac aad aah aam aan aao aar ab- aba abb abc abd abh abm abn abo abr ac- aca acb acc acd ach acm acn aco acr ad- ada adb adc add adh adm adn ado adr aha ahb ahc ahd ahh ahm ahn aho ahr ama amb amc amd amh amm amn amo amr an- ana anb anc and anh anm ann ano anr aoa aob aoc aod aoh aom aon aoo aor ar- ara arb arc ard arh arm arn aro arr baa bab bac bad bah bam ban bao bar bba bbb bbc bbd bbh bbm bbn bbo bbr bca bcb bcc bcd bch bcm bcn bco bcr bda bdb bdc bdd bdh bdm bdo bdr bha bhb bhc bhd bhh bhm bho bhr bma bmb bmc bmd bmh bmm bmn bmo bmr bna bnb bnc bnd bnn bno bnr boa bob boc bod boh bom bon boo bor bra brb brd brh brm brn bro brr c-- caa cab cac cad cah cam can cao car cba cbb cbc cbd cbh cbm cbn cbo cbr cca ccb ccc ccd cch ccm ccn cco ccr cda cdb cdc cdd cdh cdm cdn cdo cdr ch- cha chb chc chd chh chm chn cho chr cma cmb cmc cmd cmh cmm cmn cmo cmr cn- cna cnb cnc cnd cnh cnm cnn cno cnr co- coa cob coc cod coh com con coo cor cra crb crc crd crh crm crn cro crr daa dab dac dad dah dam dan dao dar dba dbb dbc dbd dbh dbm dbn dbo dbr dca dcb dcc dcd dcm dcn dco dcr dda ddb ddc ddd ddh ddm ddn ddo ddr dh- dha dhb dhc dhd dhh dhm dho dhr dma dmb dmc dmd dmh dmm dmn dmo dmr dna dnb dnc dnd dnh dnm dnn dno dnr doa dob doc dod doh dom don doo dor dra drb drc drd drm drn dro drr haa hab hac had hah ham han hao har hba hbb hbc hbd hbh hbm hbn hbo hbr hca hcb hcc hcd hch hcm hcn hco hcr hda hdb hdc hdd hdh hdm hdn hdo hdr hha hhb hhc hhd hhh hhm hhn hho hhr hma hmb hmc hmd hmh hmm hmo hmr hna hnb hnc hnd hnh hnn hno hoa hob hoc hod hoh hom hon hoo hor hr- hra hrb hrc hrd hrh hrm hrn hro hrr m-o m-r maa mab mac mad mah mam man mao mar mba mbb mbc mbd mbh mbm mbo mbr mc- mca mcb mcc mcd mch mcm mcn mco mcr mda mdb mdc mdd mdh mdm mdn mdo mdr mha mhc mhd mhh mhm mhn mho mhr mma mmb mmc mmd mmh mmm mmn mmo mmr mna mnb mnc mnm mnn mno mnr moa mob moc mod moh mom mon moo mor mra mrb mrc mrd mrh mrm mrn mro mrr naa nab nac nad nah nam nan nao nar nba nbb nbc nbd nbm nbn nbo nbr nca ncb ncc ncd nch ncm ncn nco ncr nda ndb ndc ndd ndh ndm ndn ndo ndr nha nhb nhc nhd nhh nhm nhn nhr nma nmb nmc nmd nmh nmm nmn nmo nmr nna nnb nnc nnh nnm nnn nno no- noa nob noc nod noh nom non noo nor nra nrb nrc nrd nrm nrn nro nrr oaa oab oac oad oah oam oan oao oar ob- oba obb obc obd obh obm obn obo obr oc- oca ocb occ ocd och ocm ocn oco ocr oda odb odc odd odh odm odn odo odr oha ohc ohd ohh ohm ohn oho ohr om- oma omb omc omd omh omm omn omo omr on- ona onb onc ond onh onn ono onr oo- ooa oob ooc ood ooh oom oon ooo oor or- ora orb orc ord orh orm orn oro orr ra- raa rab rac rad rah ram ran rao rar rba rbb rbc rbd rbh rbm rbn rbo rbr rca rcb rcc rcd rch rcm rcn rco rcr rda rdb rdc rdd rdh rdm rdn rdo rdr rh- rha rhb rhc rhd rhh rhm rhn rho rhr rma rmb rmc rmd rmh rmm rmn rmo rmr rna rnb rnc rnd rnh rnm rnn rno rnr roa rob roc rod roh rom ron roo ror rra rrb rrc rrd rrh rrm rrn rrr