#include <string> 
#include <sstream> 
#include <iostream> 

int main() 
{ 
  std::string input = "abc 10"; 
  std::istringstream is(input); 
  std::ostringstream os; 

  std::string s; 
  int i; 

  is >> s >> i; 
  os << i << s; 

  std::cout << os.str() << std::endl; 
}