For each case, output sum (n) in one line, followed by a blank line. You may assume the result will be in the range of 32-bit signed integer.

对于每一种情况，SUM在空白行之后的单独的一行输出。假定所有的结果都在有符号的32位整型范围之内。

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N ow, work in groups to sum up the names of the clothes we have learnt and each group asks one student to report the results to the class.

学生进行小组讨论，归纳出所学过的服装名称。然后推荐一位代表向全班学生汇报，看哪一组归纳得最多。

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N'Zogbia joined Newcastle in 2004, with the Magpies paying a nominal sum to Le Havre for their youth team player.

BBC: N'Zogbia ready to leave Newcastle