-ic b-p bbb bbc bbe bbi bbk bbn bbo bbp bbt bcb bcc bce bci bck bcn bco bcp bct be- beb bec bee bei bek ben beo bep bet bi- bib bic bie bii bik bin bio bip bit bkb bkc bke bkk bkn bko bkp bkt bnb bnc bne bni bnk bnn bno bnp bnt bob boc boe boi bok bon boo bop bot bpb bpc bpe bpi bpn bpo bpp bpt btb btc bte bti btk btn bto btp btt c-- cbb cbc cbe cbi cbk cbn cbo cbp cbt ccb ccc cce cci cck ccn cco ccp cct ce- ceb cec cee cei cek cen ceo cep cet ci- cib cic cie cii cik cin cio cip cit ckb ckc cki cko ckt cn- cnb cnc cne cni cnn cno cnp cnt co- cob coc coe coi cok con coo cop cot cpb cpc cpe cpi cpk cpn cpo cpp cpt ctb ctc cte cti ctk ctn cto ctp ctt ebb ebc ebe ebi ebk ebn ebo ebp ebt ec- ecb ecc ece eci eck ecn eco ect eeb eec eee eek een eeo eep eet eib eic eie eii eik ein eio eip eit ekb ekc eke eki eko ekp ekt en- enb enc ene eni enk enn eno enp ent eo- eob eoc eoe eoi eok eon eoo eop eot ep- epb epc epe epi epn epo epp ept etb etc ete eti etk etn eto etp ett ibb ibc ibe ibi ibk ibn ibo ibp ibt icb icc ice ici ick icn ico icp ict ie- iec iee iei iek ien iep iet iib iic iie iii iin iio iip iit ikb ikc ike iki ikk iko ikt in- inb inc ine ini ink inn ino inp int io- iob ioc ioe ioi ion ioo iop iot ipb ipc ipe ipi ipn ipo ipp ipt itb itc ite iti itk itn ito itp itt k-t kbb kbc kbe kbi kbk kbn kbo kbp kcb kcc kce kci kck kcn kcp kct ke- keb kec kee kei kek ken keo kep ket kib kic kie kii kik kin kio kip kit kkb kkc kke kki kkk kkn kkp kkt kn- knc kne kni knk knn kno knp knt kob koc koe koi kok kon koo kop kot kpc kpe kpi kpk kpn kpo kpp kpt ktb ktc kte ktk ktn kto ktp ktt n-i nbb nbc nbe nbi nbk nbn nbo nbp nbt ncb ncc nce nci nck ncn nco ncp nct ne- neb nec nee nei nek nen neo nep net nib nic nie nii nik nin nio nip nit nkc nke nki nkk nkn nko nkp nkt nnb nnc nne nni nnk nnn nno nnp nnt no- nob noc noe noi nok non noo nop not npb npc npe npi npn npo npp npt ntb ntc nte nti ntk ntn nto ntp ntt o-i ob- obb obc obe obi obk obn obo obp obt oc- ocb occ oci ock ocn oco ocp oct oeb oec oee oei oen oeo oep oet oib oic oie oii oik oin oio oip oit okb okc oke oki okk oko okp on- onb onc one oni onk onn ono onp ont oo- oob ooc ooi ook oon ooo oop oot op- opb opc ope opi opk opn opo opp opt ot- otb otc ote oti otk otn oto otp ott p-p pbb pbc pbe pbi pbk pbn pbo pbp pbt pcb pcc pce pci pck pcn pco pcp pct peb pec pee pei pek pen peo pep pet pib pic pie pii pik pin pio pip pit pkb pkc pke pki pkn pko pkp pkt pn- pnb pnc pne pni pnk pnn pno pnp pnt pob poc poe poi pok pon poo pop pot ppb ppc ppe ppi ppk ppn ppo ppp ppt pt- ptb ptc pte pti ptk ptn pto ptp ptt tbb tbc tbe tbi tbk tbn tbo tbp tbt tcb tcc tce tci tck tcn tco tcp tct te- teb tec tee tei tek ten teo tep tet tib tic tie tii tik tin tio tip tit tkb tkc tke tkk tko tkp tkt tnb tnc tne tni tnk tnn tno tnp tnt to- tob toc toe toi tok ton too top tot tpb tpc tpe tpi tpk tpn tpo tpp tpt ttb ttc tte tti ttk ttn tto ttp ttt