#include <iostream>
#include <cmath>

using namespace std;

int main()
{
  double doremi[15]={-9.,-7.,-5.,-4.,-2.,0.,2.,3.,5.,7.,8.,10.,12.,14.,15.};
  for(int i=0; i < 15; i++){
    double freq=440.*pow(2.,doremi[i]/12.);
    cout << doremi[i] << " " << freq << endl;
  }
  return 0;
}