N = gets.to_i
X = N.times.map { gets.split.map(&:to_i) }

grid = Array.new(10) { Array.new(10) }
grid[2][8] = 'A'
grid[3][9] = 'B'
grid[7][9] = 'C'

X.each do |fy, fx, ty, tx|
  grid[ty][tx] = grid[fy][fx]
  grid[fy][fx] = nil
end

if grid[5][8] == 'A' && grid[4][8] == 'B' && grid[6][8] == 'C'
  puts 'YES'
else
  puts 'NO'
end