h, w, a, b = gets.chomp.split(' ').map(&:to_i)
ans = Array.new(h).map{Array.new(w,0)}
a_1 = []
b_1 = []
flag = 0
while a do
  if h - a > a 
    a_1.push = "1"

  else 
    a_1.push = "0"
  end
end

while b do
  if w - b > b
    b_1.push = "1"
  
  else
    b_1.push = "0"

  end
end
for i in h.length
  for j in w.length
    if b > b_1.length
      ans[i][j] = 1
    else
      ans[i][j] = 0
  end
end
if flag == 1
  for 
  puts

else 
  puts "No"
end