for _ in range(int(input())):
  n = int(input())
  s = list(map(str, input()))
  ans = "Yes"
  for j in range(n):
    i = (j - 1) % n
    k = (j + 1) % n
    tmp = s[i] + s[j] + s[k]
    if tmp == "0" * 3 or tmp == "1" * 3:
      ans = "No"
      break
    if s[i] == s[j] != "?":
      s[k] = str(1-int(s[j]))
      continue
    elif s[i-1] == s[i] != "?" and s[j] == "?" and s[k] == s[(k+1)%n] != "?" and s[i] != s[k]:
      ans = "No"
      break
  print(ans)