-ic bbb bbc bbe bbh bbi bbk bbn bbo bbx bcb bcc bce bch bci bck bcn bco bcx be- beb bec bee beh bei bek ben beo bex bhb bhc bhe bhh bhi bhk bho bhx bi- bib bic bie bih bii bik bin bio bix bkb bkc bke bkk bkn bko bkx bnb bnc bne bni bnk bnn bno bnx bob boc boe boh boi bok bon boo box bxb bxi bxn bxo bxx c-- cbb cbc cbe cbh cbi cbk cbn cbo cbx ccb ccc cce cch cci cck ccn cco ccx ce- ceb cec cee ceh cei cek cen ceo cex ch- chb chc che chh chi chk chn cho chx ci- cib cic cie cih cii cik cin cio cix ckb ckc ckh cki cko ckx cn- cnb cnc cne cnh cni cnn cno cnx co- cob coc coe coh coi cok con coo cox cxc cxh cxi cxk cxo cxx ebb ebc ebe ebh ebi ebk ebn ebo ebx ec- ecb ecc ece ech eci eck ecn eco ecx eeb eec eee eek een eeo eex ehb ehc ehe ehh ehi ehn eho eib eic eie eii eik ein eio eix ekb ekc eke ekh eki eko en- enb enc ene enh eni enk enn eno eo- eob eoc eoe eoh eoi eok eon eoo ex- exc exe exh exi exo exx h-i hbb hbc hbe hbh hbi hbk hbn hbo hbx hcb hcc hce hch hci hck hcn hco he- heb hec hee heh hei hek hen heo hex hhb hhc hhe hhh hhi hhk hhn hho hib hic hie hih hii hik hin hio hix hkb hkh hki hkk hkn hko hnb hnc hne hnh hnk hnn hno hob hoc hoe hoh hoi hok hon hoo hox hxc ibb ibc ibe ibh ibi ibk ibn ibo ibx icb icc ice ich ici ick icn ico ie- iec iee iei iek ien iex ihb ihc ihe ihh ihi ihk ihn iho iib iic iie iih iii iin iio iix ikb ikc ike iki ikk iko ikx in- inb inc ine inh ini ink inn ino inx io- iob ioc ioe ioh ioi ion ioo ixc ixe ixi ixn kbb kbc kbe kbh kbi kbk kbn kbo kbx kcb kcc kce kch kci kck kcn kcx ke- keb kec kee keh kei kek ken keo kex khe khh khi khk khn kho kib kic kie kih kii kik kin kio kix kkb kkc kke kkh kki kkk kkn kn- knc kne kni knk knn kno knx kob koc koe koh koi kok kon koo kxo n-i nbb nbc nbe nbi nbk nbn nbo nbx ncb ncc nce nch nci nck ncn nco ncx ne- neb nec nee neh nei nek nen neo nex nhb nhc nhe nhh nhi nhk nhn nib nic nie nih nii nik nin nio nix nkc nke nki nkk nkn nko nnb nnc nne nnh nni nnk nnn nno no- nob noc noe noh noi nok non noo nox nxc o-i ob- obb obc obe obh obi obk obn obo obx oc- ocb occ och oci ock ocn oco ocx oeb oec oee oeh oei oen oeo oex ohc ohe ohh ohi ohn oho oib oic oie oii oik oin oio okb okc oke oki okk oko on- onb onc one onh oni onk onn ono onx oo- oob ooc ooh ooi ook oon ooo oox ox- oxb oxc oxi oxn oxo oxx xbc xbe xbx xcb xch xci xcx xee xen xex xic xie xii xin xio xix xkb xke xnc xnk xno xoc xoi xok xon xoo xox xxi xxo xxx