I got bored again at school:2

function stairword(strn)
    num = string.len(strn)
    for i=1,num do
        if string.sub(strn,i,i) ~= " " then
            print(string.sub(strn,1,i))
        end
    end
    for i=1,num-1 do
        if string.sub(strn,i,i) ~= " " then
            print(string.sub(strn,1,(num)-i))
        end
    end
end

stairword("comments like these in youtube should be exiled")