fff ffg ffi ffk ffn ffo ffs fft fgf fgg fgi fgn fgs fgt fif fig fii fik fin fis fit fkf fkg fki fkk fkt fnf fng fni fnk fnn fns fnt fof fog foi fok fon foo fos fot fsf fsg fsi fsk fsn fso fss fst ftf ftg fti ftk ftn fto fts ftt gff gfi gfk gfo gfs gft ggg ggi ggn ggo ggs ggt gif gig gii gik gin gio gis git gkn gko gks gkt gnf gni gnn gno gns gnt gof gog goi gok gon goo gos got gsf gsg gsi gsk gsn gso gss gst gtf gtg gti gtk gtn gto gts gtt i-f iff ifg ifi ifn ifo ifs ift igf igg igi igk ign igo igs igt iif iii iin iio iis iit ikf iki ikk iko iks ikt in- inf ing ini ink inn ino ins int io- iof iog ioi ion ioo ios iot is- isf isg isi isk isn iso iss ist itf itg iti itk itn ito its itt k-t kff kfg kfi kfo kfs kgf kgi kgo kgs kif kig kii kik kin kio kis kit kki kkk kkn kks kkt kn- knf kng kni knk knn kno knt kof kog koi kok kon koo kos kot ksf ksg ksi ksk ksn kso kss kst ktf ktg ktk ktn kto kts ktt n-i nff nfi nfk nfn nfo nfs nft ngf ngg ngi ngk ngn ngo ngs ngt nif nig nii nik nin nio nis nit nkf nki nkk nkn nko nks nkt nnf nng nni nnk nnn nno nns nnt no- nof nog noi nok non noo nos not nsf nsg nsi nsk nsn nso nss nst ntf ntg nti ntk ntn nto nts ntt o-i of- off ofg ofi ofn ofo ofs oft ogf ogg ogi ogn ogo ogs ogt oif oii oik oin oio ois oit okg oki okk oko oks on- onf ong oni onk onn ono ons ont oo- oof oog ooi ook oon ooo oos oot os- osf osg osi osk osn oso oss ost ot- otf otg oti otk otn oto ots ott sff sfg sfi sfk sfn sfo sfs sft sgf sgg sgi sgk sgn sgo sgs sgt sif sig sii sik sin sio sis sit sk- skf skg ski skk sko sks skt snf sng sni snk snn sno sns snt sof sog soi sok son soo sos sot ss- ssf ssg ssi ssk ssn sso sss sst stf stg sti stk stn sto sts stt tff tfg tfi tfk tfn tfo tfs tft tgf tgg tgi tgk tgn tgo tgs tgt tif tig tii tik tin tio tis tit tkg tkk tko tks tkt tnf tng tni tnk tnn tno tns tnt to- tof tog toi tok ton too tos tot tsf tsg tsi tsk tsn tso tss tst ttf ttg tti ttk ttn tto tts ttt