a-a a-b a-c aaa aab aac aah aak aar aav ab- aba abb abc abh abk abr abv ac- aca acb acc ach ack acr acv aha ahb ahc ahh ahk ahr ahv aka akb akc akh akk akr akv ar- ara arb arc arh ark arr arv av- ava avb avc avh avk avr baa bab bac bah bak bar bav bba bbb bbc bbh bbk bbr bca bcb bcc bch bck bcr bcv bha bhb bhc bhh bhk bhr bhv bka bkb bkc bkk bkr bkv bra brb brh brk brr brv bva bvb bvc bvh bvk bvr bvv c-- caa cab cac cah cak car cav cba cbb cbc cbh cbk cbr cbv cca ccb ccc cch cck ccr ccv ch- cha chb chc chh chk chr chv cka ckb ckc ckh cra crb crc crh crk crr crv cva cvb cvc cvh cvk cvr cvv haa hab hac hah hak har hav hba hbb hbc hbh hbk hbr hbv hca hcb hcc hch hck hcr hcv hha hhb hhc hhh hhk hhr hhv hka hkb hkh hkk hkr hr- hra hrb hrc hrh hrk hrr hrv hv- hva hvb hvc hvk hvr hvv ka- kaa kab kac kah kak kar kav kba kbb kbc kbh kbk kbr kca kcb kcc kch kck kcr kha khh khk khr khv kkb kkc kkh kkk kkr kkv kra krc krk krr krv kva kvb kvh kvk kvr kvv ra- raa rab rac rah rak rar rav rba rbb rbc rbh rbk rbr rca rcb rcc rch rcr rcv rh- rha rhb rhc rhh rhr rhv rkb rkc rkk rkv rra rrb rrc rrh rrk rrr rva rvb rvc rvh rvr rvv v-a vaa vab vac vah vak var vav vba vbc vbh vbk vbr vbv vca vcc vch vcr vh- vha vhb vhc vka vkb vra vrb vrc vrh vrk vrr vva vvb vvc vvr vvv