//if found, return the index of the name
//otherwise, return -1.
//To remove the item of index j from a
nameList
//After a "while" loop, the last item is duplicate.
//So, use pop() to delete the duplicate item.
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//a function to search whether a
name is in the
list //if found, return the index of the name //otherwise, return -1.
//To remove the item of index j from a
nameList
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