#include <algorithm>
#include <cctype>
#include <iostream>
#include <string>
int main()
{
std::string dmr = "UNIX is basically a simple operating system, but you have to be a genius to understand the simplicity.";
auto last = std::remove_if(dmr.begin(), dmr.end(), ispunct);
dmr.erase(last, dmr.end());
std::cout << dmr << std::endl;
}
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