fff ffi ffk ffn ffo fft fif fii fik fin fit fkf fki fkk fkt fnf fni fnk fnn fnt fof foi fok fon foo fot ftf fti ftk ftn fto ftt i-f iff ifi ifn ifo ift iif iii iin iio iit ikf iki ikk iko ikt in- inf ini ink inn ino int io- iof ioi ion ioo iot itf iti itk itn ito itt k-t kff kfi kfo kif kii kik kin kio kit kki kkk kkn kkt kn- knf kni knk knn kno knt kof koi kok kon koo kot ktf ktk ktn kto ktt n-i nff nfi nfk nfn nfo nft nif nii nik nin nio nit nkf nki nkk nkn nko nkt nnf nni nnk nnn nno nnt no- nof noi nok non noo not ntf nti ntk ntn nto ntt o-i of- off ofi ofn ofo oft oif oii oik oin oio oit oki okk oko on- onf oni onk onn ono ont oo- oof ooi ook oon ooo oot ot- otf oti otk otn oto ott tff tfi tfk tfn tfo tft tif tii tik tin tio tit tkk tko tkt tnf tni tnk tnn tno tnt to- tof toi tok ton too tot ttf tti ttk ttn tto ttt