import sys
input = lambda :sys.stdin.readline()[:-1]
ni = lambda :int(input())
na = lambda :list(map(int,input().split()))
yes = lambda :print("yes");Yes = lambda :print("Yes");YES = lambda : print("YES")
no = lambda :print("no");No = lambda :print("No");NO = lambda : print("NO")
#######################################################################
h,w = na()

a = [[i * w + j+1 for j in range(w)]for i in range(h)]

b = [[0 for j in range(w)]for i in range(h)]
for i in range(h):
    for j in range(w):
        if i%2:
            b[i][j] = a[i][-1-j]
        else:
            b[i][j] = a[i][j]

b, a = [[0 for j in range(w)]for i in range(h)], b
for i in range(h):
    for j in range(w):
        if j%2:
            b[i][j] = a[-1-i][j]
        else:
            b[i][j] = a[i][j]
Yes()
for i in b:
    print(*i)