t = int(input())

color = ["Red", "Blue"]

ans = []
for _ in range(t):
  n, m = map(int, input().split())
  a = set(list(map(int, input().split())))
  b = set(list(map(int, input().split())))

  xs = a & b
  if len(a) > 0 and len(b) > 0 and len(xs) == 0:
    ans.append("No")
    continue

  a -= xs
  b -= xs
  xs = list(xs)

  ans.append("Yes")
  for x in b:
    ans.append(color[1] + " " + str(x))

  if len(xs) > 0:
    x = xs.pop()
    ans.append(color[1] + " " + str(x))
    ans.append(color[0] + " " + str(x))

  for x in a:
    ans.append(color[0] + " " + str(x))

  for i in range(len(xs)):
    ans.append(color[i % 2] + " " + str(xs[i]))
    ans.append(color[1 - i % 2] + " " + str(xs[i]))

print(*ans, sep="\n")