bbb bbc bbe bbh bbo bbs bcb bcc bce bch bco bcs be- beb bec bee beh beo bes bhb bhc bhe bhh bho bhs bob boc boe boh boo bos bsb bsc bse bsh bso bss c-- cbb cbc cbe cbh cbo cbs ccb ccc cce cch cco ccs ce- ceb cec cee ceh ceo ces ch- chb chc che chh cho chs co- cob coc coe coh coo cos csb csc cse csh cso css ebb ebc ebe ebh ebo ebs ec- ecb ecc ece ech eco ecs eeb eec eee eeo ees ehb ehc ehe ehh eho ehs eo- eob eoc eoe eoh eoo eos es- esb esc ese esh eso ess hbb hbc hbe hbh hbo hbs hcb hcc hce hch hco hcs he- heb hec hee heh heo hes hhb hhc hhe hhh hho hhs hob hoc hoe hoh hoo hos hsb hsc hse hsh hss ob- obb obc obe obh obo obs oc- ocb occ och oco ocs oeb oec oee oeh oeo oes ohc ohe ohh oho ohs oo- oob ooc ooh ooo oos os- osb osc ose osh oso oss sbb sbc sbe sbh sbo sbs scb scc sce sch sco scs se- seb sec see seh seo ses sh- shb shc she shh sho shs sob soc soe soh soo sos ss- ssb ssc sse ssh sso sss