-- your code goes here

a = {{1,2,3,4,},
     {5,6,7,8,},
     {9,10,11,12},
     {13,14,15,16}}
     
bottom = {}
top = {}

for i, v in ipairs(a) do
	for j, w in ipairs(v) do
		if(i > j) then
			table.insert(bottom, w)
		else if(i < j) then
			table.insert(top, w)
		end
	end
end
end

print("Top:")
for i=1, #top do
	print(top[i])
end

print("Bottom:")
for i = 1, #bottom do
	print(bottom[i])
end