i-v iii iin iio iip iit in- ini inn ino inp int inv io- ioi ion ioo iop iot iov ipi ipn ipo ipp ipt ipv iti itn ito itp itt itv ivi ivo ivp ivt ivv n-i nii nin nio nip nit niv nni nnn nno nnp nnt nnv no- noi non noo nop not nov npi npn npo npp npt npv nti ntn nto ntp ntt ntv nvi nvn nvp nvt nvv o-i oii oin oio oip oit oiv on- oni onn ono onp ont oo- ooi oon ooo oop oot oov op- opi opn opo opp opt opv ot- oti otn oto otp ott otv ov- ovi ovo ovp ovv p-p pii pin pio pip pit piv pn- pni pnn pno pnp pnt pnv poi pon poo pop pot pov ppi ppn ppo ppp ppt ppv pt- pti ptn pto ptp ptt ptv pvi pvn pvo pvp pvt pvv tii tin tio tip tit tiv tni tnn tno tnp tnt to- toi ton too top tot tov tpi tpn tpo tpp tpt tpv tti ttn tto ttp ttt ttv tvi tvn tvo tvp tvt vi- vii vin vio vip vit viv vn- vni vno vnp vnv voi von voo vop vot vov vpi vpn vpo vpp vpt vti vto vtt vtv vvi vvo vvt vvv