fff ffi ffk ffn ffs fft fif fii fik fin fis fit fkf fki fkk fkt fnf fni fnk fnn fns fnt fsf fsi fsk fsn fss fst ftf fti ftk ftn fts ftt i-f iff ifi ifn ifs ift iif iii iin iis iit ikf iki ikk iks ikt in- inf ini ink inn ins int is- isf isi isk isn iss ist itf iti itk itn its itt k-t kff kfi kfs kif kii kik kin kis kit kki kkk kkn kks kkt kn- knf kni knk knn knt ksf ksi ksk ksn kss kst ktf ktk ktn kts ktt n-i nff nfi nfk nfn nfs nft nif nii nik nin nis nit nkf nki nkk nkn nks nkt nnf nni nnk nnn nns nnt nsf nsi nsk nsn nss nst ntf nti ntk ntn nts ntt sff sfi sfk sfn sfs sft sif sii sik sin sis sit sk- skf ski skk sks skt snf sni snk snn sns snt ss- ssf ssi ssk ssn sss sst stf sti stk stn sts stt tff tfi tfk tfn tfs tft tif tii tik tin tis tit tkk tks tkt tnf tni tnk tnn tns tnt tsf tsi tsk tsn tss tst ttf tti ttk ttn tts ttt