bbb bbc bbe bbm bbt bcb bcc bce bcm bct be- beb bec bee bem bet bmb bmc bme bmm bmt btb btc bte btm btt c-- cbb cbc cbe cbm cbt ccb ccc cce ccm cct ce- ceb cec cee cem cet cmb cmc cme cmm cmt ctb ctc cte ctm ctt ebb ebc ebe ebm ebt ec- ecb ecc ece ecm ect eeb eec eee eem eet em- emb emc eme emm emt etb etc ete etm ett mbb mbc mbe mbm mbt mc- mcb mcc mce mcm mct meb mec mee mem met mmb mmc mme mmm mmt mtb mtc mte mtm mtt tbb tbc tbe tbm tbt tcb tcc tce tcm tct te- teb tec tee tem tet tmb tmc tme tmm tmt ttb ttc tte ttm ttt