books = gets.to_i.times.map{gets.split(" ")}
series = ["iti", "ni", "san", "yon"]
num_of_sorted_items = 0
books_last_index = books.length-1
while num_of_sorted_items < books_last_index do
    (1..books_last_index-num_of_sorted_items).each do |index|
        if books[index][0] <  books[index-1][0] then
            books[index-1], books[index] = books[index], books[index-1]
        elsif books[index][0] == books[index-1][0] then
            if series.index(books[index][1]) < series.index(books[index-1][1])
                books[index-1], books[index] = books[index], books[index-1]
            end
        end
    end
    num_of_sorted_items += 1
end

books.each{|item| puts "#{item[0]}\s#{item[1]}"}