-ic bbb bbc bbg bbi bbk bbn bbo bbt bcb bcc bcg bci bck bcn bco bct bgb bgc bgg bgi bgk bgn bgo bgt bi- bib bic big bii bik bin bio bit bkb bkc bkg bkk bkn bko bkt bnb bnc bng bni bnk bnn bno bnt bob boc bog boi bok bon boo bot btb btc btg bti btk btn bto btt c-- cbb cbc cbg cbi cbk cbn cbo cbt ccb ccc ccg cci cck ccn cco cct cgb cgc cgg cgi cgn cgo cgt ci- cib cic cig cii cik cin cio cit ckb ckc cki cko ckt cn- cnb cnc cng cni cnn cno cnt co- cob coc cog coi cok con coo cot ctb ctc ctg cti ctk ctn cto ctt gbc gbg gbi gbk gbn gbo gbt gcb gcc gcg gci gck gcn gco gct ggb ggc ggg ggi ggn ggo ggt gib gic gig gii gik gin gio git gkb gkn gko gkt gnb gnc gni gnn gno gnt gob goc gog goi gok gon goo got gtb gtc gtg gti gtk gtn gto gtt ibb ibc ibg ibi ibk ibn ibo ibt icb icc icg ici ick icn ico ict igb igc igg igi igk ign igo igt iib iic iii iin iio iit ikb ikc iki ikk iko ikt in- inb inc ing ini ink inn ino int io- iob ioc iog ioi ion ioo iot itb itc itg iti itk itn ito itt k-t kbb kbc kbi kbk kbn kbo kcb kcc kcg kci kck kcn kct kgb kgc kgi kgo kib kic kig kii kik kin kio kit kkb kkc kki kkk kkn kkt kn- knc kng kni knk knn kno knt kob koc kog koi kok kon koo kot ktb ktc ktg ktk ktn kto ktt n-i nbb nbc nbg nbi nbk nbn nbo nbt ncb ncc ncg nci nck ncn nco nct ngb ngc ngg ngi ngk ngn ngo ngt nib nic nig nii nik nin nio nit nkc nki nkk nkn nko nkt nnb nnc nng nni nnk nnn nno nnt no- nob noc nog noi nok non noo not ntb ntc ntg nti ntk ntn nto ntt o-i ob- obb obc obg obi obk obn obo obt oc- ocb occ ocg oci ock ocn oco oct ogc ogg ogi ogn ogo ogt oib oic oii oik oin oio oit okb okc okg oki okk oko on- onb onc ong oni onk onn ono ont oo- oob ooc oog ooi ook oon ooo oot ot- otb otc otg oti otk otn oto ott tbb tbc tbg tbi tbk tbn tbo tbt tcb tcc tcg tci tck tcn tco tct tgb tgc tgg tgi tgk tgn tgo tgt tib tic tig tii tik tin tio tit tkb tkc tkg tkk tko tkt tnb tnc tng tni tnk tnn tno tnt to- tob toc tog toi tok ton too tot ttb ttc ttg tti ttk ttn tto ttt