#include <iostream>
#include <sstream>
#include <string>
int main() {
float val;
std::string str;
std::string temp;
std::getline(std::cin,str);
std::stringstream ss(str);
while(getline(ss,temp, ' '))
{
std::stringstream stream(temp);
if(stream >> val)
std::cout<<2*val<<std::endl;
else
std::cout<<temp<<std::endl;
}
}
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