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

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

now=1

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

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

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

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

print("Yes")

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