import java.util.; public class test { public static void main(String[] args) { / Scanner in = new Scanner(System.in); Deque deque = new ArrayDeque<>(); int n = in.nextInt(); int m = in.nextInt();

        for (int i = 0; i < n; i++) {
            int num = in.nextInt();

        }*/

        Scanner in=new Scanner(System.in);
List<String> li=new ArrayList<String>();
int n=in.nextInt();
int m=in.nextInt();
for(int i=0;i<n;i++)
{
li.add(in.next());
}
int sum=-1000;
for(int i=0;i<(n+1)-m;i++)
{
HashSet<String> h=new HashSet<String>();
for(int j=i;j<m+i;j++)
{
h.add(li.get(j));
}
if(sum<h.size())
{
sum=h.size();
}
h.clear();
}
System.out.println(sum);
    }
}

My code is getting error in testcase 9 and timeout in testcase 8................ \ can anyone tell me the reason for the timeout or error