#include <iostream> using namespace std; int main() { int a; cin>>a; if(a==0){ cout<<"a"; }else if(a==1){ cout<<"b"; }else if(a==2){ cout<<"c"; }else if(a==3){ cout<<"d"; }else if(a==4){ cout<<"e"; }else if(a==5){ cout<<"A"; }else if(a==6){ cout<<"B"; }else if(a==7){ cout<<"C"; }else if(a==8){ cout<<"D"; }else if(a==9){ cout<<"E"; } return 0; }