输入一个只包含英文和空格和英文的字符串，然后输出其反序

#include<bits/stdc++.h>
using namespace std;
int main()
{
    ______(1)________
    string s;
    while (cin >> s) 
    {                
        ss.push(s);
    }
     while (!ss.empty())
     {
         cout << _____(2)______<<" ";
         ss.pop();
     }
     return 0;
}

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