line = gets.chomp!
abort unless line=~/^\d+$/
n=line.to_i
abort unless 1 <= n && n <= 10000
n.times do
  line = gets.chomp!
  abort unless line=~/^\d+ \d+$/
  y, x = line.split.map(&:to_i)
  abort unless 0 <= y && y <= 88
  abort unless 0 <= x && x <= 100
end
abort if gets