use warnings;
my @iparray = ( "return" , "revert" , "reveal" , "rebel" , "real" , "relm" , "reign" , "response" ) ;
my @sortedarray = sort ( @iparray ) ; my @oparray ;
my $lowerlimit = 0 ;
my $upperlimit ;
my $count = 0 ;
my $inc = 1 ;
my $mat = 0 ;
my $matchedstring ;
sub splitter
{
if ( $mat == 0 )
{
$lowerlimit = $lowerlimit + 1 ;
$count = $lowerlimit ;
func( ) ;
}
else
{
$matchedstring = substr ( $sortedarray [ $count - 1 ] , 0 , $mat ) ; my $temp = $upperlimit ;
if ( $temp > scalar ( @sortedarray ) ) {
$temp = ( scalar ( @sortedarray ) - 1 ) ; }
while ( $temp >= $lowerlimit )
{
$word = substr ( $sortedarray [ $temp ] , $mat , length ( $sortedarray [ $temp ] ) ) ; if ( $word eq "" )
{
}
else
{
}
$temp --;
}
if ( $upperlimit >= scalar ( @sortedarray ) ) {
print "All the words are parsed" ; last ;
}
else
{
$lowerlimit = $upperlimit + 1 ;
$count = $lowerlimit ;
$inc = 1 ;
func( ) ;
}
}
}
sub func
{
$base = substr ( $sortedarray [ $count ] , 0 , $inc ) ; if ( defined $sortedarray [ $count + 1 ] ) {
$match = substr ( $sortedarray [ $count + 1 ] , 0 , $inc ) ; }
else
{
$s = substr ( $sortedarray [ $count - 1 ] , 0 , $inc ) ; if ( $s eq $base )
{
$upperlimit = $count ;
$count = $lowerlimit ;
$inc ++;
func( ) ;
}
else
{
last ;
}
}
print ( "\n " , $base , " " , $match ) ; $count ++;
if ( $base ne $match )
{
if ( ( $count - 1 ) == $lowerlimit )
{
my $lcount = $count ;
my $ucount = $count + 1 ;
if ( $ucount == scalar ( @sortedarray ) ) {
$upperlimit = $count + 1 ;
$mat = $inc - 1 ;
splitter( ) ;
}
else
{
my $ulimit = $upperlimit ;
print ( "\n " , $lcount , "\n " , $ucount , "\n " , $ulimit ) ; while ( $ulimit >= $count )
{
my $new = substr ( $sortedarray [ $lcount ] , 0 , $inc ) ; my $new1 = substr ( $sortedarray [ $ucount ] , 0 , $inc ) ; if ( $new eq $new1 )
{
$upperlimit = $lcount - 1 ;
$mat = $inc - 1 ;
splitter( ) ;
}
else
{
$ulimit --;
$lcount ++;
$ucount ++;
print ( "\n " , $lcount , "\n " , $ucount , "\n " , $ulimit ) ; }
}
$mat = $inc - 1 ;
splitter( ) ;
}
}
else
{
$inc ++;
unless ( ( $count ) == $upperlimit )
{
$count = $lowerlimit ;
func( ) ;
}
}
}
else
{
$upperlimit = $count ;
func( ) ;
}
}
func( ) ;
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