bbb bbc bbd bbk bbn bbo bbs bbx bcb bcc bcd bck bcn bco bcs bcx bdb bdc bdd bdk bdo bds bdx bkb bkc bkk bkn bko bks bkx bnb bnc bnd bnk bnn bno bns bnx bob boc bod bok bon boo bos box bsb bsc bsd bsk bsn bso bss bsx bxb bxd bxn bxo bxx c-- cbb cbc cbd cbk cbn cbo cbs cbx ccb ccc ccd cck ccn cco ccs ccx cdb cdc cdd cdk cdn cdo cds cdx ckb ckc ckd cko cks ckx cn- cnb cnc cnd cnn cno cns cnx co- cob coc cod cok con coo cos cox csb csc csd csk csn cso css csx cxc cxk cxo cxs cxx dbb dbc dbd dbk dbn dbo dbs dbx dcb dcc dcd dck dcn dco dcs dcx ddb ddc ddd ddk ddn ddo dds ddx dkb dkc dkk dko dks dkx dnb dnc dnd dnk dnn dno dns dob doc dod dok don doo dos dox dsb dsc dsd dsk dsn dso dss dsx dxc dxd dxn dxo dxs dxx kbb kbc kbd kbk kbn kbo kbs kbx kcb kcc kcd kck kcn kcs kcx kdb kdc kdk kdo kds kdx kkb kkc kkk kkn kks kn- knc knd knk knn kno knx kob koc kod kok kon koo kos ksb ksc ksd ksk ksn kso kss kxo nbb nbc nbd nbk nbn nbo nbs nbx ncb ncc ncd nck ncn nco ncs ncx ndb ndc ndd ndk ndn ndo nds nkc nkk nkn nko nks nnb nnc nnk nnn nno nns no- nob noc nod nok non noo nos nox nsb nsc nsd nsk nsn nso nss nsx nxc nxd ob- obb obc obd obk obn obo obs obx oc- ocb occ ocd ock ocn oco ocs ocx odb odc odd odn odo ods okb okc okd okk oko oks on- onb onc ond onk onn ono ons onx oo- oob ooc ood ook oon ooo oos oox os- osb osc osd osk osn oso oss osx ox- oxb oxc oxn oxo oxx sbb sbc sbd sbk sbn sbo sbs sbx scb scc scd sck scn sco scs scx sdb sdc sdd sdk sdn sdo sds sk- skb skc skd skk sko sks skx snb snc snd snk snn sno sns sob soc sod sok son soo sos sox ss- ssb ssc ssd ssk ssn sso sss ssx sxc sxn sxs xbc xbx xcb xcd xcx xdb xdc xdk xds xkb xks xnc xnk xno xns xoc xod xok xon xoo xos xox xsb xsc xss xxo xxx