1027. Colors in Mars

#include<iostream>
using namespace std;
void pr(int c){
  switch(c){
  case 10:cout<<"A";break;
  case 11:cout<<"B";break;
  case 12:cout<<"C";break;
  default:cout<<c;}
}
int main(){
  cout<<'#';
  for(int k,i=0;i<3;++i){cin>>k; pr(k/13); pr(k%13);}
}