from sys import exit
n, k = map(int, input().split())
a = list(map(int, input().split()))
for i in range(k-1):
	for j in range(i+1, k):
		if a[j] - a[i] == 1:
			if a[i] not in {2, 3, 5, 8}:
				print("No")
				exit()
		elif a[j] - a[i] == 3:
			if a[i] not in {2, 5}:
				print("No")
				exit()
		elif a[j] - a[i] == 5:
			if a[i] not in {3, 4, 6, 9}:
				print("No")
				exit()
dp = [True for _ in range(25)]
for x in a:
	if x < 25:
		dp[x] = False

for i in range(18, 0, -1):
	for j in range(1, 4):
		if dp[i+j] == False and dp[i+7-j] == False:
			dp[i] = False

print("Yes" if dp[1] else "No")