Elves and Their Codes

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Scanner;
import java.lang.Object.*;
import java.util.List;

/**
 *
 * @author Manoo
 */
public class Main {
    
    static final char[] arr = "ABCDEFGHIJKLMNOPQRSTUVWXYZ ".toCharArray();
        
   static  Integer[] row=new Integer[27];
   
   static  Integer[] columns=new Integer[27];
   
   public static StringBuffer decode(Integer[] msg)
        {
            
            StringBuffer gift=new StringBuffer("");
            
            for(int i=0;i<msg.length;i++)
            {
                int index=msg[i];
                index=index-1;
                int num=row[index];
                int letter=columns[num];
                columns=swap(columns,index);
                row=swap(row,index);
                gift.append(arr[letter]);
                
            }
            return gift;
        }
    
    public static Integer[] swap(Integer[] array,int index)
    {
        if(index==26)
        {
            return array;
        }
        
        
        int num=array[index];
        List<Integer> list=new ArrayList<Integer>(Arrays.asList(array));
        list.remove(num);
        list.add(25, num);
        array = list.toArray(array);
        
        return array;
    
    }
        
    
   
    public static void main(String[] args) {
        
        Scanner in=new Scanner(System.in);
        int counter=0;
        
          for(int i=0;i<row.length;i++)
        {
            row[i]=i;
        }
    
       for(int j=0;j<columns.length;j++)
        {
            columns[j]=j;
        }
       
       //System.out.println(row[0]);
        
      //System.out.println(java.util.Arrays.toString(arr));
       
      //int T = in.nextInt();
      
      while(in.hasNextLine())
      {
      counter++;
      int t=in.nextInt();
      in.nextLine();
      
      for(int j=0;j<t;j++)
          
      {
          
      String userinput=in.nextLine();
      String[] arrrr=userinput.split(" ");
      Integer[] userArray = new Integer[arrrr.length];
      
      for(int i = 0;i < arrrr.length;i++)
       {
          int number=Integer.parseInt(arrrr[i]);
          Integer num1=new Integer(number);
          userArray[i] = num1;
       }
      
//      for(int i = 0;i < userArray.length;i++)
//       {
//         System.out.println(userArray[i]);
//       }
      
     StringBuffer Message = decode(userArray);
     System.out.println(" LISTA #" + counter);
     System.out.println(Message.toString());
      }
      
    }
        
        
        
        }
//        
    }