bbb bbc bbe bbh bbo bcb bcc bce bch bco be- beb bec bee beh beo bhb bhc bhe bhh bho bob boc boe boh boo c-- cbb cbc cbe cbh cbo ccb ccc cce cch cco ce- ceb cec cee ceh ceo ch- chb chc che chh cho co- cob coc coe coh coo ebb ebc ebe ebh ebo ec- ecb ecc ece ech eco eeb eec eee eeo ehb ehc ehe ehh eho eo- eob eoc eoe eoh eoo hbb hbc hbe hbh hbo hcb hcc hce hch hco he- heb hec hee heh heo hhb hhc hhe hhh hho hob hoc hoe hoh hoo ob- obb obc obe obh obo oc- ocb occ och oco oeb oec oee oeh oeo ohc ohe ohh oho oo- oob ooc ooh ooo