h, w = map(int, input().split())

ANS = [[0 for _ in range(w)] for _ in range(h)]
curr = 1
for i in range(h):
    for j in range(w):
        if (i + j) % 2 == 0:
            ANS[i][j] = curr
            curr += 1
for i in range(h - 1, -1, -1):
    for j in range(w - 1, -1, -1):
        if (i + j) % 2 == 1:
            ANS[i][j] = curr
            curr += 1
print("Yes")
for i in range(h):
    print(*ANS[i])