-ic bbb bbc bbe bbg bbi bbk bbn bbo bbt bcb bcc bce bcg bci bck bcn bco bct be- beb bec bee beg bei bek ben beo bet bgb bgc bge bgg bgi bgk bgn bgo bgt bi- bib bic bie big bii bik bin bio bit bkb bkc bke bkg bkk bkn bko bkt bnb bnc bne bng bni bnk bnn bno bnt bob boc boe bog boi bok bon boo bot btb btc bte btg bti btk btn bto btt c-- cbb cbc cbe cbg cbi cbk cbn cbo cbt ccb ccc cce ccg cci cck ccn cco cct ce- ceb cec cee ceg cei cek cen ceo cet cgb cgc cge cgg cgi cgn cgo cgt ci- cib cic cie cig cii cik cin cio cit ckb ckc cki cko ckt cn- cnb cnc cne cng cni cnn cno cnt co- cob coc coe cog coi cok con coo cot ctb ctc cte ctg cti ctk ctn cto ctt ebb ebc ebe ebg ebi ebk ebn ebo ebt ec- ecb ecc ece ecg eci eck ecn eco ect eeb eec eee eeg eek een eeo eet egb egc ege egg egi egn ego egt eib eic eie eig eii eik ein eio eit ekb ekc eke ekg eki eko ekt en- enb enc ene eng eni enk enn eno ent eo- eob eoc eoe eog eoi eok eon eoo eot etb etc ete etg eti etk etn eto ett gbc gbe gbg gbi gbk gbn gbo gbt gcb gcc gce gcg gci gck gcn gco gct ge- geb gec gee geg gei gek gen geo get ggb ggc ggg ggi ggn ggo ggt gib gic gie gig gii gik gin gio git gkb gkn gko gkt gnb gnc gne gni gnn gno gnt gob goc goe gog goi gok gon goo got gtb gtc gte gtg gti gtk gtn gto gtt ibb ibc ibe ibg ibi ibk ibn ibo ibt icb icc ice icg ici ick icn ico ict ie- iec iee ieg iei iek ien iet igb igc ige igg igi igk ign igo igt iib iic iie iii iin iio iit ikb ikc ike iki ikk iko ikt in- inb inc ine ing ini ink inn ino int io- iob ioc ioe iog ioi ion ioo iot itb itc ite itg iti itk itn ito itt k-t kbb kbc kbe kbi kbk kbn kbo kcb kcc kce kcg kci kck kcn kct ke- keb kec kee keg kei kek ken keo ket kgb kgc kgi kgo kib kic kie kig kii kik kin kio kit kkb kkc kke kki kkk kkn kkt kn- knc kne kng kni knk knn kno knt kob koc koe kog koi kok kon koo kot ktb ktc kte ktg ktk ktn kto ktt n-i nbb nbc nbe nbg nbi nbk nbn nbo nbt ncb ncc nce ncg nci nck ncn nco nct ne- neb nec nee neg nei nek nen neo net ngb ngc nge ngg ngi ngk ngn ngo ngt nib nic nie nig nii nik nin nio nit nkc nke nki nkk nkn nko nkt nnb nnc nne nng nni nnk nnn nno nnt no- nob noc noe nog noi nok non noo not ntb ntc nte ntg nti ntk ntn nto ntt o-i ob- obb obc obe obg obi obk obn obo obt oc- ocb occ ocg oci ock ocn oco oct oeb oec oee oeg oei oen oeo oet ogc oge ogg ogi ogn ogo ogt oib oic oie oii oik oin oio oit okb okc oke okg oki okk oko on- onb onc one ong oni onk onn ono ont oo- oob ooc oog ooi ook oon ooo oot ot- otb otc ote otg oti otk otn oto ott tbb tbc tbe tbg tbi tbk tbn tbo tbt tcb tcc tce tcg tci tck tcn tco tct te- teb tec tee teg tei tek ten teo tet tgb tgc tge tgg tgi tgk tgn tgo tgt tib tic tie tig tii tik tin tio tit tkb tkc tke tkg tkk tko tkt tnb tnc tne tng tni tnk tnn tno tnt to- tob toc toe tog toi tok ton too tot ttb ttc tte ttg tti ttk ttn tto ttt