bbb bbe bbn bbo bbq bbs be- beb bee ben beo beq bes bnb bne bnn bno bns bob boe bon boo boq bos bqe bsb bse bsn bso bss ebb ebe ebn ebo ebq ebs eeb eee een eeo ees en- enb ene enn eno ens eo- eob eoe eon eoo eoq eos eqe eqn eqq eqs es- esb ese esn eso esq ess nbb nbe nbn nbo nbs ne- neb nee nen neo nes nnb nne nnn nno nns no- nob noe non noo nos nqs nsb nse nsn nso nss ob- obb obe obn obo obs oeb oee oen oeo oes on- onb one onn ono ons oo- oob oon ooo oos oqb oqo os- osb ose osn oso osq oss qbe qbq qbs qee qen qeo qnb qne qns qoo qos qqq qso sbb sbe sbn sbo sbq sbs se- seb see sen seo seq ses snb sne snn sno sns sob soe son soo soq sos sqn sqq sqs ss- ssb sse ssn sso ssq sss