Please Help ! Getting RE(NZEC) (Java)

Getting RE(NZEC) (Java)

Here is my Code !!

    import java.io.*;


    public class MainRE

    {

    static String a;

    static String b;

    static private int ls[][];

    static int arr[];

    static int L;

    public static void main(String[] args) throws IOException

    {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int testCount =Integer.parseInt(br.readLine());

        for (int i = 1; i <= testCount; i++)
        {
            try
            {
                a=br.readLine();
                b=br.readLine();
                L=Integer.parseInt(br.readLine());
                arr=new int [L];
                initDp();
                printLs();
            }
            catch(Exception e)
            {
                break;

            }
        }

    }

    public static void printLs() 
    {
        for (int i = 0; i <= a.length(); i++) 
        {
            for (int j = 0; j <= b.length(); j++) 
            {
                if(ls[i][j]>0)updatearr(ls[i][j]);
            }
        }
        for(int z=0;z<arr.length;z++)
        {
            System.out.print(arr[z]);
            if(z<arr.length-1)System.out.print(" ");

        }
        System.out.println();     
    }

    public static void updatearr(int n)
    {
        for(int z=0;z<arr.length;z++)
        {
            if(n>=(z+1))arr[z]++;
        }
    }

    private static void initDp()
    {
        ls = new int[a.length() + 1][b.length() + 1];
        for (int i = 0; i <= a.length(); i++)
            ls[i][0] = 0;

        for (int j = 0; j <= b.length(); j++)
            ls[0][j] = 0;

        for (int i = 1; i <= a.length(); i++) 
        {
            for (int j = 1; j <= b.length(); j++)
            {
                ls[i][j] = (a.charAt(i - 1) != b.charAt(j - 1)) ? 0 : ls[i - 1][j - 1] + 1;
            }
        }
    }

}