四位分别来自中国、美国、俄罗斯、加拿大的小学生都以自己的国土面积大而骄傲不已，

但是他们想知道到底谁的国土最大，谁的最小，他们的判断如下：

加拿大学生：加拿大最大，美国最小，俄罗斯第三。

美国学生：美国最大，加拿大最小，俄罗斯第二，中国第三。

中国学生：美国最小，加拿大第三。

他们互不相让，最后老师下定结论：对于上述四国面积的判断，他们每人只判断对了一个国家。对于

老师的提示，四位小学生还是绞尽脑汁推断不出到底是谁的国土最大，谁的最小！现请编制程序告诉

四位小学生正确顺序。-Four are from China, the United States, Russia, Canada s primary and secondary school students are in their own land area very large and proud,

But they want to know who in the end of the land the most, who s the smallest, their judgments as follows:

Canada Student: Canada s largest, the smallest United States, Russia third.

American students: the United States the largest and smallest of Canada, the Russian Second, China s third.

Chinese students: the smallest United States, Canada third.

They refused to give ground, and finally decided Teacher Conclusion: For the four countries to determine the area, each of them only to judge a country yes. For

Teacher tips, four primary school students in the end not infer or brains of the land who are the largest and the smallest one! Please tell the preparation procedures are

The correct order of the four primary school students.