H,W=map(int,input().split())

ANS=[[0]*W for i in range(H)]

now=1

for i in range(H):
    for j in range(W):
        if (i+j)%2==0:
            ANS[i][j]=now
            now+=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]=now
            now+=1

print("Yes")

for i in range(H):
    print(*ANS[i])