package main

import (
	"bufio"
	"fmt"
	"io"
	"os"
	"strconv"
)

var iost *Iost

type Iost struct {
	Scanner *bufio.Scanner
	Writer  *bufio.Writer
}

func NewIost(fp io.Reader, wfp io.Writer) *Iost {
	const BufSize = 2000005
	scanner := bufio.NewScanner(fp)
	scanner.Split(bufio.ScanWords)
	scanner.Buffer(make([]byte, BufSize), BufSize)
	return &Iost{Scanner: scanner, Writer: bufio.NewWriter(wfp)}
}
func (i *Iost) Text() string {
	if !i.Scanner.Scan() {
		panic("scan failed")
	}
	return i.Scanner.Text()
}
func (i *Iost) Atoi(s string) int                 { x, _ := strconv.Atoi(s); return x }
func (i *Iost) GetNextInt() int                   { return i.Atoi(i.Text()) }
func (i *Iost) Atoi64(s string) int64             { x, _ := strconv.ParseInt(s, 10, 64); return x }
func (i *Iost) GetNextInt64() int64               { return i.Atoi64(i.Text()) }
func (i *Iost) Atof64(s string) float64           { x, _ := strconv.ParseFloat(s, 64); return x }
func (i *Iost) GetNextFloat64() float64           { return i.Atof64(i.Text()) }
func (i *Iost) Print(x ...interface{})            { fmt.Fprint(i.Writer, x...) }
func (i *Iost) Printf(s string, x ...interface{}) { fmt.Fprintf(i.Writer, s, x...) }
func (i *Iost) Println(x ...interface{})          { fmt.Fprintln(i.Writer, x...) }
func isLocal() bool                               { return os.Getenv("WITHIN") == "TEMPTATION" }
func main() {
	fp := os.Stdin
	wfp := os.Stdout
	if isLocal() {
		fp, _ = os.Open(os.Getenv("REMEMBER_YOU_AS_LONG_AS_I_CAN"))
	}
	iost = NewIost(fp, wfp)
	defer func() {
		iost.Writer.Flush()
	}()
	solve()
}
func solve() {
	h := iost.GetNextInt()
	w := iost.GetNextInt()
	g := makeGrid(h, w)
	if w%2 == 0 {
		write(0, 0, 1, 1, 1, g)
		write(0, w-1, -1, h*w, -1, g)
	} else {
		wodd(h, w, g)
	}
	iost.Println("Yes")
	for i := 0; i < h; i++ {
		for j := 0; j < w; j++ {
			if j > 0 {
				iost.Print(" ")
			}
			iost.Print(g[i][j])
		}
		iost.Println("")
	}
}
func wodd(h, w int, g [][]int) {
	s := 1
	for i := 0; i < h*w; i += 2 {
		g[i/w][i%w] = s
		s++
	}
	s = h * w
	for i := 1; i < h*w; i += 2 {
		g[i/w][i%w] = s
		s--
	}
}
func write(y, x, dx, s, ds int, g [][]int) {
	h := len(g)
	w := len(g[0])
	for y < h {
		g[y][x] = s
		s += ds
		for i := 0; i < 2; i++ {
			if w%2 == 0 {

			}
			if x+dx >= w || x+dx < 0 {
				y++
				dx = -dx
			} else {
				x += dx
			}
			if y == h {
				return
			}
		}
	}
}
func makeGrid(h, w int) [][]int {
	index := make([][]int, h)
	data := make([]int, h*w)
	for i := 0; i < h; i++ {
		index[i] = data[i*w : (i+1)*w]
	}
	return index
}