Pozisiya strok

Zdrastvuyte.Naprimer:@1. xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx? 1.aaaaaaaaaa 2.bbbbbbbbbb 3.ccccccccccc 4.dddddddddd@2. xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx? 1.aaaaaaaaaa 2.bbbbbbbbbb 3.ccccccccccc 4.ddddddddddKak sdelat tak, chtobi esli vstretit simvol @ to eto vopros, posle etoy stroki otveti(4 stroki)?Esli vstretit slduyushiy simvol @ to eto 2 roy vopros i 4 otveta(4 stroki). Kak etu realizovat php'e???Spasibo zaraniye.