n = gets.chomp.to_i
aaa = []
ccc = []
MAX = 100
for i in 0..n-1 do
  aaa.push(gets.chomp.split(" ").map(&:to_i))
end

for j in 1..MAX do
  for i in 0..n-1 do
    ccc.push(aaa[i][j])
  end
end

ccc.each do |elm|
  print elm," " unless elm == nil
end

print "\n"