import java.util.*;

public class _5430 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int T = Integer.parseInt(sc.nextLine());
        
        for(int t = 0; t<T; t++){
            boolean invertFlag = false;
            boolean errorFlag = false;
            String opcode = sc.nextLine();
            int n = Integer.parseInt(sc.nextLine());
            String[] line = sc.nextLine().replace("[","").replace("]","").split(",");
            Deque<Integer> arr = new LinkedList<>();
            for(String s : line){
                if(s.isEmpty()) break;
                arr.add(Integer.parseInt(s));
            }
            
            for(int i=0; i<opcode.length(); i++){
                if(opcode.charAt(i) == 'R'){
                    invertFlag = !invertFlag;
                }
                else if(opcode.charAt(i) == 'D'){
                    n--;
                    Integer temp;
                    if(invertFlag){
                        temp = arr.pollLast();
                    }
                    else {
                        temp = arr.pollFirst();
                    }
                    if(temp == null){
                        errorFlag = true;
                        break;
                    }
                }
            }

            if(errorFlag){
                System.out.println("error");
                continue;
            }

            StringBuilder sb = new StringBuilder("[");
            for(int ii=0; ii<n; ii++){
                if(invertFlag)  sb.append(arr.pollLast());
                else sb.append(arr.pollFirst());

                if(ii!=n-1) sb.append(",");
            }

            sb.append("]");
            System.out.println(sb.toString());
        }
        sc.close();
    }
}