bbb bbc bbd bbe bbm bbo bbs bcb bcc bcd bce bcm bco bcs bdb bdc bdd bde bdm bdo bds be- beb bec bed bee bem beo bes bmb bmc bmd bme bmm bmo bms bob boc bod boe bom boo bos bsb bsc bsd bse bsm bso bss c-- cbb cbc cbd cbe cbm cbo cbs ccb ccc ccd cce ccm cco ccs cdb cdc cdd cde cdm cdo cds ce- ceb cec ced cee cem ceo ces cmb cmc cmd cme cmm cmo cms co- cob coc cod coe com coo cos csb csc csd cse csm cso css dbb dbc dbd dbe dbm dbo dbs dcb dcc dcd dce dcm dco dcs ddb ddc ddd dde ddm ddo dds de- deb dec ded dee dem deo des dmb dmc dmd dme dmm dmo dms dob doc dod doe dom doo dos dsb dsc dsd dse dsm dso dss ebb ebc ebd ebe ebm ebo ebs ec- ecb ecc ecd ece ecm eco ecs ed- edb edc edd ede edm edo eds eeb eec eed eee eem eeo ees em- emb emc emd eme emm emo ems eo- eob eoc eod eoe eom eoo eos es- esb esc esd ese esm eso ess m-o mbb mbc mbd mbe mbm mbo mbs mc- mcb mcc mcd mce mcm mco mcs mdb mdc mdd mde mdm mdo mds meb mec med mee mem meo mes mmb mmc mmd mme mmm mmo mms mob moc mod moe mom moo mos msb msc msd mse msm mso mss ob- obb obc obd obe obm obo obs oc- ocb occ ocd ocm oco ocs odb odc odd ode odm odo ods oeb oec oed oee oem oeo oes om- omb omc omd ome omm omo oms oo- oob ooc ood oom ooo oos os- osb osc osd ose osm oso oss sbb sbc sbd sbe sbm sbo sbs scb scc scd sce scm sco scs sdb sdc sdd sde sdm sdo sds se- seb sec sed see sem seo ses smb smc smd sme smm smo sms sob soc sod soe som soo sos ss- ssb ssc ssd sse ssm sso sss