BACKJOON5430.py

# AC

import sys
from collections import deque

input = sys.stdin.readline

t = int(input())
result = []
for _ in range(t):
    cmd = input().strip()
    size = int(input())
    array = input().strip()

    if size == 0 :
        num = deque()
    else :
        num = deque(map(int, array[1:-1].split(',')))

    reverseFlag = False
    errorFlag = False
    for c in cmd:
        if c == "R":
            reverseFlag = not reverseFlag
        elif c == "D":
            if len(num) == 0 :
                result.append("error")
                errorFlag = True
                break
            else :
                if reverseFlag :
                    num.pop()
                else :
                    num.popleft()

    if not errorFlag :
        if reverseFlag :
            num.reverse()
        result.append("[" + ",".join(map(str, num)) + "]")

print("\n".join(result))