iii iin iio iip iis iit in- ini inn ino inp ins int io- ioi ion ioo iop ios iot ipi ipn ipo ipp ips ipt is- isi isn iso isp iss ist iti itn ito itp its itt itz izi izo izz n-i nii nin nio nip nis nit niz nni nnn nno nnp nns nnt nnz no- noi non noo nop nos not noz npi npn npo npp nps npt npz nsi nsn nso nsp nss nst nsz nti ntn nto ntp nts ntt ntz nzi nzo nzp nzs nzz o-i oii oin oio oip ois oit oiz on- oni onn ono onp ons ont oo- ooi oon ooo oop oos oot op- opi opn opo opp ops opt os- osi osn oso osp oss ost ot- oti otn oto otp ots ott otz ozo ozs ozt ozz p-p pii pin pio pip pis pit piz pn- pni pnn pno pnp pns pnt poi pon poo pop pos pot poz ppi ppn ppo ppp pps ppt ppz ps- psi psn pso psp pss pst pt- pti ptn pto ptp pts ptt ptz pzp pzt sii sin sio sip sis sit sni snn sno snp sns snt soi son soo sop sos sot soz spi spn spo spp sps spt spz ss- ssi ssn sso ssp sss sst ssz sti stn sto stp sts stt stz szi szp tii tin tio tip tis tit tiz tni tnn tno tnp tns tnt tnz to- toi ton too top tos tot toz tpi tpn tpo tpp tps tpt tpz tsi tsn tso tsp tss tst tti ttn tto ttp tts ttt tzs zin zio zip zis zit ziz znn zno znp zns zo- zoi zon zoo zos zot zpi zpo zpp zpt zsi zst zsz zzs zzt zzz