bbb bbc bbe bbg bbo bcb bcc bce bcg bco bcv be- beb bec bee beg beo bev bgb bgc bge bgg bgo bgv bob boc boe bog boo bov bvb bvc bve bvg bvo bvv c-- cbb cbc cbe cbg cbo cbv ccb ccc cce ccg cco ccv ce- ceb cec cee ceg ceo cev cgb cgc cge cgg cgo cgv co- cob coc coe cog coo cov cvb cvc cve cvg cvo cvv ebb ebc ebe ebg ebo ebv ec- ecb ecc ece ecg eco ecv eeb eec eee eeg eeo eev egb egc ege egg ego eo- eob eoc eoe eog eoo evb evc eve evg evo evv gbc gbe gbg gbo gbv gcb gcc gce gcg gco ge- geb gec gee geg geo gev ggb ggc ggg ggo ggv gob goc goe gog goo gov gvb gvc gve gvg gvo ob- obb obc obe obg obo obv oc- ocb occ ocg oco ocv oeb oec oee oeg oeo ogc oge ogg ogo oo- oob ooc oog ooo oov ov- ovb ovc ove ovo ovv v-e vbc vbg vbo vbv vcc vce vco veb vec vee veg veo vgc vgg vgo vob voc voe vog voo vov vvb vvc vvg vvo vvv