#include<iostream>
using namespace std; 
int main(){
cout<<"0000B 0"<<endl;
cout<<"0001B 1"<<endl;
cout<<"0010B 2"<<endl;
cout<<"0011B 3"<<endl;
cout<<"0100B 4"<<endl;
cout<<"0101B 5"<<endl;
cout<<"0110B 6"<<endl;
cout<<"0111B 7"<<endl;
cout<<"1000B 8"<<endl;
cout<<"1001B 9"<<endl;
cout<<"1010B 10"<<endl;
cout<<"1011B 11"<<endl;
cout<<"1100B 12"<<endl;
cout<<"1101B 13"<<endl;
cout<<"1110B 14"<<endl;
cout<<"1111B 15"<<endl;
     return 0;
}