V ncbybtvmr bapr ntnva, naq V ubcr guvf vf gur ynfg gvzr V unir gb obgure lbh.
Fbyivat chmmyr 30 fgvyy frrzf vzcbffvoyr gb zr. V guvax V'ir svtherq bhg chmmyr 28. Sbe fbzr ernfba, V unq nffhzrq gung "pybavat" gur uhzna svtherf jnf bayl cbffvoyr bapr. Vafgrnq, ol zbivat gur pbcl bognvarq ng gur obggbz bs gur chmmyr qbja naq hc, vg'f cbffvoyr gb perngr gjb pbcvrf ng gur gbc, juvyr trggvat evq bs gur barf perngrq ba gur fvqrf ol hfvat gur rzcgl fcnprf. V guvax guvf vf n eryngviryl ryrtnag fbyhgvba gb gur chmmyr.
Ubjrire, guvf qbrfa'g pbzcyrgryl fbyir chmmyr 30, fvapr V fgvyy unira'g sbhaq n jnl gb trg gur svtherf gb gur evtug fvqr bs gur chmmyr. Gur "fznyyrfg arj ehyr" V'ir znantrq gb vagebqhpr gb fbyir vg vf gur cbffvovyvgl bs "fjnccvat" punenpgref jura gurl chfu ntnvafg rnpu bgure jvgubhg orvat noyr gb ynaq ba na rzcgl fdhner. (Guvf jbhyq nyybj zr gb trg cnfg gur cneg jurer V'z fghpx, anzryl gur gjb qvntbanyyl pbaarpgrq fdhnerf orgjrra gur inevbhf xavtug'f Y-funcrq whzcf.) Ubjrire, guvf zrpunavp qbrfa'g nccrne va nal bgure chmmyr (nf sne nf V pna gryy), fb vg jbhyq frrz fgenatr gb zr.
Ertneqvat gur pbybef, vs V znl uhzoyl bssre zl bcvavba, V guvax fjnccvat lryybj naq checyr jbhyq znxr zber frafr: gur erznvavat cevznel pbybe jbhyq unir n zber onfvp zbirzrag cnggrea, juvyr checyr jbhyq orpbzr n serr pbzovangvba bs "+"-funcrq naq "×"-funcrq zbirzragf, whfg nf lbh'q rkcrpg sebz zvkvat gur gjb pbybef.
Svanyyl, vf gurer nal jnl gb svanapvnyyl fhccbeg lbh naq lbhe pbyynobengbef? Arvgure Pvapuebzngvp abe 0Cynlre frrzf gb npprcg qbangvbaf (be nz V zvfgnxra?).