a-a a-b a-c aaa aab aac aae aah aav ab- aba abb abc abe abh abv ac- aca acb acc ace ach acv aea aeb aec aee aeh aev aha ahb ahc ahe ahh ahv av- ava avb avc ave avh baa bab bac bae bah bav bba bbb bbc bbe bbh bca bcb bcc bce bch bcv be- bea beb bec bee beh bev bha bhb bhc bhe bhh bhv bva bvb bvc bve bvh bvv c-- caa cab cac cae cah cav cba cbb cbc cbe cbh cbv cca ccb ccc cce cch ccv ce- cea ceb cec cee ceh cev ch- cha chb chc che chh chv cva cvb cvc cve cvh cvv eaa eab eac eae eah eav eba ebb ebc ebe ebh ebv ec- eca ecb ecc ece ech ecv eea eeb eec eee eev eha ehb ehc ehe ehh ehv eva evb evc eve evh evv haa hab hac hae hah hav hba hbb hbc hbe hbh hbv hca hcb hcc hce hch hcv he- hea heb hec hee heh hev hha hhb hhc hhe hhh hhv hv- hva hvb hvc hvv v-a v-e vaa vab vac vae vah vav vba vbc vbh vbv vca vcc vce vch vea veb vec vee veh vh- vha vhb vhc vhe vva vvb vvc vvv