近日在甘肃兰州有一位网友拍摄自家狐狸和狗一起生活的视频火爆全网，这只狐狸一开口让人们感觉它“狗里狗气的”。根据主人表示，这只狐狸是去年在养殖场中购买的，它从小就和狗一起长大，也能看家护院，如果发现到异
Imagine I have a stack-based toy language that comes with the operations Push, Pop, Jump and If. I have a program and its input is the toy language. For instance I get the sequence
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