h, w = read_line.split.map(&.to_i)
s = Array.new(h) do |i|
  read_line.chars.map_with_index { |ch, j| (ch == '#') ^ ((i + j) % 2 == 0) }
end
rs = Array.new(h, false)
cs = Array.new(w, false)
read_line.to_i.times do
  t, n = read_line.split.map(&.to_i)
  if t == 1
    rs[n - 1] = true
  else
    cs[n - 1] = true
  end
end
(h - 2).downto(0) do |i|
  if s[i][-1] != s[i + 1][-1] && rs[i]
    0.upto(i) do |r|
      w.times do |c|
        s[r][c] ^= true
      end
    end
  end
end
(w - 2).downto(0) do |i|
  if s[-1][i] != s[-1][i + 1] && cs[i]
    h.times do |r|
      0.upto(i) do |c|
        s[r][c] ^= true
      end
    end
  end
end
puts h.times.all? { |i| w.times.all? { |j| s[i][j] == s[0][0] } } ? "Yes" : "No"