#include <unordered_set>
#include <iostream>
using namespace std;
int main() {
unordered_set<string> s;
s.insert("kek");
s.insert("123214");
s.insert("mem");
s.insert("");
s.insert("memes");
s.insert("meme");
for (auto i : s)
cout <<i <<' ';
cout <<endl;
return 0;
}
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