给定一首歌曲的歌词，随机生成一首新歌的开头，并将其与原歌词拼接在一起。
We are the champions, my friends, And we'll keep on fighting 'til the end.
Let's rise up to the challenge, show the world what we can do. We are the champions, my friends, And we'll keep on fighting 'til the end.