n = gets.chomp.to_i
rook = [2,8]
silver_r = [3,9]                                                       
silver_l = [7,9]
n.times {
    x1, y1, x2, y2 = gets.chomp.split.map &:to_i
    dst = [x2, y2]

    case [x1, y1]
    when rook
        rook = dst    
    when silver_r
        silver_r = dst
    when silver_l
        silver_l = dst
    end
}
if rook == [5,8] and silver_r == [4,8] and silver_l == [6,8]
    puts "YES"
else
    puts "NO"
end