-ic bbb bbc bbd bbe bbi bbn bbo bbs bbt bcb bcc bcd bce bci bcn bco bcs bct bdb bdc bdd bde bdi bdo bds bdt be- beb bec bed bee bei ben beo bes bet bi- bib bic bid bie bii bin bio bis bit bnb bnc bnd bne bni bnn bno bns bnt bob boc bod boe boi bon boo bos bot bsb bsc bsd bse bsi bsn bso bss bst btb btc btd bte bti btn bto bts btt c-- cbb cbc cbd cbe cbi cbn cbo cbs cbt ccb ccc ccd cce cci ccn cco ccs cct cdb cdc cdd cde cdi cdn cdo cds cdt ce- ceb cec ced cee cei cen ceo ces cet ci- cib cic cid cie cii cin cio cis cit cn- cnb cnc cnd cne cni cnn cno cns cnt co- cob coc cod coe coi con coo cos cot csb csc csd cse csi csn cso css cst ctb ctc ctd cte cti ctn cto cts ctt dbb dbc dbd dbe dbi dbn dbo dbs dbt dcb dcc dcd dce dci dcn dco dcs dct ddb ddc ddd dde ddi ddn ddo dds ddt de- deb dec ded dee dei den deo des det di- dib dic did die dii din dio dis dit dnb dnc dnd dne dni dnn dno dns dnt dob doc dod doe doi don doo dos dot dsb dsc dsd dse dsi dsn dso dss dst dtb dtc dtd dte dti dtn dto dts dtt ebb ebc ebd ebe ebi ebn ebo ebs ebt ec- ecb ecc ecd ece eci ecn eco ecs ect ed- edb edc edd ede edi edn edo eds edt eeb eec eed eee een eeo ees eet eib eic eid eie eii ein eio eis eit en- enb enc end ene eni enn eno ens ent eo- eob eoc eod eoe eoi eon eoo eos eot es- esb esc esd ese esi esn eso ess est etb etc etd ete eti etn eto ets ett i-d ibb ibc ibd ibe ibi ibn ibo ibs ibt icb icc icd ice ici icn ico ics ict idb idc idd ide idi idn ido ids idt ie- iec ied iee iei ien ies iet iib iic iid iie iii iin iio iis iit in- inb inc ind ine ini inn ino ins int io- iob ioc iod ioe ioi ion ioo ios iot is- isb isc isd ise isi isn iso iss ist itb itc itd ite iti itn ito its itt n-i nbb nbc nbd nbe nbi nbn nbo nbs nbt ncb ncc ncd nce nci ncn nco ncs nct ndb ndc ndd nde ndi ndn ndo nds ndt ne- neb nec ned nee nei nen neo nes net nib nic nid nie nii nin nio nis nit nnb nnc nne nni nnn nno nns nnt no- nob noc nod noe noi non noo nos not nsb nsc nsd nse nsi nsn nso nss nst ntb ntc ntd nte nti ntn nto nts ntt o-i ob- obb obc obd obe obi obn obo obs obt oc- ocb occ ocd oci ocn oco ocs oct odb odc odd ode odi odn odo ods odt oeb oec oed oee oei oen oeo oes oet oib oic oid oie oii oin oio ois oit on- onb onc ond one oni onn ono ons ont oo- oob ooc ood ooi oon ooo oos oot os- osb osc osd ose osi osn oso oss ost ot- otb otc otd ote oti otn oto ots ott sbb sbc sbd sbe sbi sbn sbo sbs sbt scb scc scd sce sci scn sco scs sct sdb sdc sdd sde sdi sdn sdo sds sdt se- seb sec sed see sei sen seo ses set sib sic sid sie sii sin sio sis sit snb snc snd sne sni snn sno sns snt sob soc sod soe soi son soo sos sot ss- ssb ssc ssd sse ssi ssn sso sss sst stb stc std ste sti stn sto sts stt tbb tbc tbd tbe tbi tbn tbo tbs tbt tcb tcc tcd tce tci tcn tco tcs tct tdb tdc tdd tde tdi tdn tdo tds tdt te- teb tec ted tee tei ten teo tes tet tib tic tid tie tii tin tio tis tit tnb tnc tnd tne tni tnn tno tns tnt to- tob toc tod toe toi ton too tos tot tsb tsc tsd tse tsi tsn tso tss tst ttb ttc ttd tte tti ttn tto tts ttt