a-a a-b a-c aaa aab aac aah aak aam aar ab- aba abb abc abh abk abm abr ac- aca acb acc ach ack acm acr aha ahb ahc ahh ahk ahm ahr aka akb akc akh akk akm akr ama amb amc amh amk amm amr ar- ara arb arc arh ark arm arr baa bab bac bah bak bam bar bba bbb bbc bbh bbk bbm bbr bca bcb bcc bch bck bcm bcr bha bhb bhc bhh bhk bhm bhr bka bkb bkc bkk bkm bkr bma bmb bmc bmh bmk bmm bmr bra brb brh brk brm brr c-- caa cab cac cah cak cam car cba cbb cbc cbh cbk cbm cbr cca ccb ccc cch cck ccm ccr ch- cha chb chc chh chk chm chr cka ckb ckc ckh ckm cma cmb cmc cmh cmk cmm cmr cra crb crc crh crk crm crr haa hab hac hah hak ham har hba hbb hbc hbh hbk hbm hbr hca hcb hcc hch hck hcm hcr hha hhb hhc hhh hhk hhm hhr hka hkb hkh hkk hkm hkr hma hmb hmc hmh hmk hmm hmr hr- hra hrb hrc hrh hrk hrm hrr ka- kaa kab kac kah kak kam kar kba kbb kbc kbh kbk kbm kbr kca kcb kcc kch kck kcm kcr kha khh khk khm khr kkb kkc kkh kkk kkm kkr kma kmb kmc kmh kmk kmm kra krc krk krr m-r maa mab mac mah mak mam mar mba mbb mbc mbh mbk mbm mbr mc- mca mcb mcc mch mck mcm mcr mha mhc mhh mhk mhm mhr mka mkb mkc mkh mkk mkm mkr mma mmb mmc mmh mmk mmm mmr mra mrb mrc mrh mrk mrm mrr ra- raa rab rac rah rak ram rar rba rbb rbc rbh rbk rbm rbr rca rcb rcc rch rcm rcr rh- rha rhb rhc rhh rhm rhr rkb rkc rkk rkm rma rmb rmc rmh rmm rmr rra rrb rrc rrh rrk rrm rrr