#!/usr/bin/perl

$/ = undef;
open F, "l/levels-list";
@levels = ("00", split(/[ \n]+/,<F>), "99");

if ($ARGV[0] eq 'max') {
    print $levels[$#levels-1];
} elsif ($ARGV[0] eq 'min') {
    print $levels[1];
} else {
    $pos = 0;
    while ($levels[$pos] != $ARGV[1]) {
	die if $pos == $#levels-1;
	$pos++;
    }
    if ($ARGV[0] eq 'next') {
    	print $levels[$pos+1];
    } elsif ($ARGV[0] eq 'prev') {
    	print $levels[$pos-1];
    } else {
	die;
    }
}
print "\n";