import java.util.$*$;

public class LookupMultipleNumber $\{$

public static void main$($String$[]$ args$)\{$

Scanner in $=$ new Scanner$($System$.$in$)$; $//$ Use Scanner for standard input

int maxRes $=$ Integer.parseInt$($args$[1])$;

int keyField $=$ Integer.parseInt$($args$[2])$;

int valField $=$ Integer.parseInt$($args$[3])$;

Map$>$ map $=$ new LinkedHashMap$<>()$;

while $($in$.$hasNextLine$())\{$

String line $=$ in$.$nextLine$()$;

String$[]$ tokens $=$ line.split$(",")$;

String key $=$ tokens$[$keyField$]$;

String val $=$ tokens$[$valField$]$;

map.putIfAbsent$($key$,$ new LinkedList$<>())$;

map.get$($key$).$add$($val$)$; $//$ Use add for Queue

$\}$

Scanner stdin $=$ new Scanner$($System$.$in$)$; $//$ New Scanner for standard input

while $($stdin$.$hasNext$())\{$

String s $=$ stdin.next$()$;

if $(!$map.containsKey$($s$))\{$

System.out.println$("$null$")$;

$\}$ else $\{$

int i $=0$;

for $($String value : map.get$($s$))\{$

System.out.print$($value $+"")$;

i$++$;

if $($i $==$ maxRes$)\{$

break;

$\}$

$\}$

System.out.println$()$;

$\}$

$\}$

in$.$close$()$;

stdin.close$()$;

$\}$

$\}$

MSample runs would be as follows $($refer to input file amino.csv$).$

$>$java LookupMultipleNumber amino.csv $230$

Tryptophan

TGG

Cysteine

TGT TGC