eee eef eeo eep eet eev ef- efe eff efi efo efp eft eie eif eii eio eip eit eiv eo- eoe eof eoi eoo eop eot ep- epe epf epi epo epp ept ete etf eti eto etp ett etv eve evf evi evo evp evt evv fee fef fei feo fep fet fev ffe fff ffi ffo ffp fft ffv fie fif fii fip fit foe fof foi foo fop fot fpe fpi fpo fpp fpt fpv fte ftf fti fto ftp ftt ftv fvp fvt i-f i-v ie- iee ief iei iep iet iev ife iff ifi ifo ifp ift iie iif iii iio iip iit io- ioe iof ioi ioo iop iot iov ipe ipf ipi ipo ipp ipt ipv ite itf iti ito itp itt itv ive ivf ivi ivo ivp ivt ivv o-i oee oef oei oeo oep oet of- ofe off ofi ofo ofp oft ofv oie oif oii oio oip oit oiv oo- oof ooi ooo oop oot oov op- ope opf opi opo opp opt opv ot- ote otf oti oto otp ott otv ov- ove ovf ovi ovo ovp ovv p-p pee pef pei peo pep pet pev pfe pff pfi pfo pfp pft pfv pie pif pii pio pip pit piv poe pof poi poo pop pot pov ppe ppf ppi ppo ppp ppt ppv pt- pte ptf pti pto ptp ptt ptv pve pvf pvi pvo pvp pvt pvv te- tee tef tei teo tep tet tev tfe tff tfi tfo tfp tft tie tif tii tio tip tit tiv to- toe tof toi too top tot tov tpe tpf tpi tpo tpp tpt tpv tte ttf tti tto ttp ttt ttv tve tvf tvi tvo tvp tvt v-e vee vef vei veo vep vet vff vfi vfp vft vfv vi- vie vif vii vio vip vit viv voe vof voi voo vop vot vov vpe vpf vpi vpo vpp vpt vte vti vto vtt vtv vvi vvo vvt vvv