Answer to the 3rd Question: Studious Student - Using PHP

<?php

$r_l[]="joicfs joi xul nzndjoi nzndjoijoi nznd nzndjoijoi ssre cfs";
$r_l[]="nnozzwtf ahkjj wtp t sj htawm ihw egzinwju vn";
$r_l[]="z dvqgfh wqx vnajabkqvs sdwkc dlhcnc ezrcvsc teje gzwwj";
$r_l[]="dcn csmzj krnc vkcoume wvpva yqoexwujwp v cxepgptf xb";
$r_l[]="jibw ji jp bw jibw";
$r_l[]="izqht h qpbdayaifl pjsoie sujccnm umj dralemrspo euswuti m";
$r_l[]="u ufmu ufmuqfy vmc ufm uqfy z vmcu qfy";
$r_l[]="ksdzsjz bbio ja mvvyxzkmq zgdvxolmt xgvwdbfqzn rhubnqtaad qa eeb";
$r_l[]="r wwwr ndtc ndtclp lpb b wwwb www lp";
$r_l[]="eavcqvv wyuh mkfq not evhlpur eidqnartht pesgphnnlq t ztvu";
$r_l[]="rgh woqg dmabatgbt qrvpcrx eluunoi sy w wnthqxgkg aimallazuc";
$r_l[]="myrzwdyhv pojiires fbjbkcbtq pzdfuxfh rq ukbom ypkffomyl tdko zbwqkbuu";
$r_l[]="k duz q rc lvraw";
$r_l[]="i hsmh hsmheh xgi eh xg xgeh xnfc ihsmh";
$r_l[]="wehfri kclm ri qgca gt qgcagt qgcagt wehf qgcagtqgca";
$r_l[]="vkzzfgtobz i tkczlqaf peqmnyoh eogzpbe bgorlllxor bkkupvnqr gsr xfqmteh";
$r_l[]="hdfeax d s uxnnrzko nxpcu v njxqbnh aaqzeeb kxpkw";
$r_l[]="uiuy hopji li j dcyi";
$r_l[]="facebook hacker cup for studious students";
$r_l[]="wjxwgm qdhmzkmpzv uhibo gcikegpzv ceqiwekdx rxegvkc ujjvbv kfit peiawyk";

//$s = "uiuy hopji li j dcyi";
foreach($r_l as $rlval){
$r_s = explode(' ',$rlval);
//print_r($r_s);
sort($r_s);
foreach($r_s as $key => $val){
  if($key>=0 && $key<=8){
      if(   (  (strlen($val))   >=1)    &&    (   (strlen($val))   <=10   )   )   {echo $val;}
  }
} echo "<br>";



}
?>


The answer is:
cfsjoijoicfsnzndnzndjoinzndjoijoinzndjoijoissrexul
ahkjjegzinwjuhtawmihwnnozzwtfsjtvnwtp
dlhcncdvqgfhezrcvscgzwwjsdwkctejevnajabkqvswqxz
csmzjcxepgptfdcnkrncvvkcoumewvpvaxbyqoexwujwp
bwjijibwjibwjp
dralemrspoeuswutihizqhtmpjsoieqpbdayaiflsujccnmumj
qfyuufmufmuufmuqfyuqfyvmcvmcuz
bbioeebjaksdzsjzmvvyxzkmqqarhubnqtaadxgvwdbfqznzgdvxolmt
blplpbndtcndtclprwwwwwwbwwwr
eavcqvveidqnarthtevhlpurmkfqnotpesgphnnlqtwyuhztvu
aimallazucdmabatgbteluunoiqrvpcrxrghsywwnthqxgkgwoqg
fbjbkcbtqmyrzwdyhvpojiirespzdfuxfhrqtdkoukbomypkffomylzbwqkbuu
duzklvrawqrc
ehhsmhhsmhehiihsmhxgxgehxgixnfc
gtkclmqgcaqgcagtqgcagtqgcagtqgcariwehfwehfri
bgorlllxorbkkupvnqreogzpbegsripeqmnyohtkczlqafvkzzfgtobzxfqmteh
aaqzeebdhdfeaxkxpkwnjxqbnhnxpcusuxnnrzkov
dcyihopjijliuiuy
cupfacebookforhackerstudentsstudious
ceqiwekdxgcikegpzvkfitpeiawykqdhmzkmpzvrxegvkcuhiboujjvbvwjxwgm
ShowHideComments