#include<iostream>
using namespace std;

int main()
{ int n,k,d,a,b,x;
  cin>>n;
  d=1+8*n;
  k=(-1+sqrt(d*1.0))/2;
  if(k*(k+1)/2==n) cout<<"A1 B"<<k;
  else
  {
  x=k*(k+1)/2+1;
  a=k+1-(n-x);
  b=n+1-x;
  cout<<"A"<<a<<" B"<<b;
  }
  return 0;
}