bbb bbc bbd bbe bbk bbs bcb bcc bcd bce bck bcs bdb bdc bdd bde bdk bds be- beb bec bed bee bek bes bkb bkc bke bkk bks bsb bsc bsd bse bsk bss c-- cbb cbc cbd cbe cbk cbs ccb ccc ccd cce cck ccs cdb cdc cdd cde cdk cds ce- ceb cec ced cee cek ces ckb ckc ckd cks csb csc csd cse csk css dbb dbc dbd dbe dbk dbs dcb dcc dcd dce dck dcs ddb ddc ddd dde ddk dds de- deb dec ded dee dek des dkb dkc dke dkk dks dsb dsc dsd dse dsk dss ebb ebc ebd ebe ebk ebs ec- ecb ecc ecd ece eck ecs ed- edb edc edd ede edk eds eeb eec eed eee eek ees ekb ekc ekd eke eks es- esb esc esd ese esk ess kbb kbc kbd kbe kbk kbs kcb kcc kcd kce kck kcs kdb kdc kde kdk kds ke- keb kec ked kee kek kes kkb kkc kke kkk kks ksb ksc ksd kse ksk kss sbb sbc sbd sbe sbk sbs scb scc scd sce sck scs sdb sdc sdd sde sdk sds se- seb sec sed see sek ses sk- skb skc skd ske skk sks ss- ssb ssc ssd sse ssk sss