-ic bbb bbc bbe bbi bbo bcb bcc bce bci bco bcv be- beb bec bee bei beo bev bi- bib bic bie bii bio biv bob boc boe boi boo bov bvb bvc bve bvi bvo bvv c-- cbb cbc cbe cbi cbo cbv ccb ccc cce cci cco ccv ce- ceb cec cee cei ceo cev ci- cib cic cie cii cio civ co- cob coc coe coi coo cov cvb cvc cve cvi cvo cvv ebb ebc ebe ebi ebo ebv ec- ecb ecc ece eci eco ecv eeb eec eee eeo eev eib eic eie eii eio eiv eo- eob eoc eoe eoi eoo evb evc eve evi evo evv i-v ibb ibc ibe ibi ibo ibv icb icc ice ici ico icv ie- iec iee iei iev iib iic iie iii iio io- iob ioc ioe ioi ioo iov ivb ivc ive ivi ivo ivv o-i ob- obb obc obe obi obo obv oc- ocb occ oci oco ocv oeb oec oee oei oeo oib oic oie oii oio oiv oo- oob ooc ooi ooo oov ov- ovb ovc ove ovi ovo ovv v-e vbc vbi vbo vbv vcc vce vci vco veb vec vee vei veo vi- vib vic vie vii vio viv vob voc voe voi voo vov vvb vvc vvi vvo vvv