#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;
}

}