bbb bbe bbl bbm bbn bbs be- beb bee bel bem ben bes blb ble bll blm bln bls bmb bme bml bmm bmn bms bnb bne bnl bnn bns bsb bse bsl bsm bsn bss ebb ebe ebl ebm ebn ebs eeb eee eel eem een ees elb ele ell elm eln els em- emb eme eml emm emn ems en- enb ene enl enm enn ens es- esb ese esl esm esn ess lbb lbe lbl lbm lbs leb lee lel lem len les llb lle lll llm lln lls lmb lme lml lmm lmn lms lnb lne lnl lnm lnn lns lsb lse lsl lsm lsn lss mbb mbe mbl mbm mbs meb mee mel mem men mes mlb mle mll mlm mln mls mmb mme mml mmm mmn mms mnb mne mnl mnm mnn mns msb mse msl msm msn mss nbb nbe nbl nbm nbn nbs ne- neb nee nel nem nen nes nlb nle nll nlm nln nls nmb nme nml nmm nmn nms nnb nne nnl nnm nnn nns nsb nse nsl nsm nsn nss sbb sbe sbl sbm sbn sbs se- seb see sel sem sen ses slb sle sll slm sln sls smb sme sml smm smn sms snb sne snl snm snn sns ss- ssb sse ssl ssm ssn sss