import sys

# sys.setrecursionlimit(200005)
int1 = lambda x: int(x)-1
pDB = lambda *x: print(*x, end="\n", file=sys.stderr)
p2D = lambda x: print(*x, sep="\n", end="\n\n", file=sys.stderr)
def II(): return int(sys.stdin.readline())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]
def LI1(): return list(map(int1, sys.stdin.readline().split()))
def LLI1(rows_number): return [LI1() for _ in range(rows_number)]
def SI(): return sys.stdin.readline().rstrip()

# dij = [(0, 1), (-1, 0), (0, -1), (1, 0)]
dij = [(0, 1), (-1, 0), (0, -1), (1, 0), (1, 1), (1, -1), (-1, 1), (-1, -1)]
inf = (1 << 63)-1
# inf = (1 << 31)-1
# md = 10**9+7
md = 998244353

h, w = LI()

aa = [[0]*w for _ in range(h)]

i = j = 0
dj = 2
for a in range(1, (h*w+3)//2):
    aa[i][j] = a
    j += dj
    if j >= w:
        dj = -2
        j = 2*w-1-j
        i += 1
    elif j < 0:
        dj = 2
        j = -1-j
        i += 1
i = 0
j = w-1-(w & 1)
dj = -2
for a in range(h*w, h*w-h*w//2, -1):
    aa[i][j] = a
    j += dj
    if j >= w:
        dj = -2
        j = 2*w-1-j
        i += 1
    elif j < 0:
        dj = 2
        j = -1-j
        i += 1

print("Yes")
for a in aa: print(*a)