#include <bits/stdc++.h>
using namespace std;

int main(){
  int A,B,C;
  cin>>A>>B>>C;
  if(A>B && B>C){
    cout<<"A"<<endl;
    cout<<"B"<<endl;
    cout<<"C"<<endl;
    return 0;
  }
  if(A>C && C>B){
    cout<<"A"<<endl;
    cout<<"C"<<endl;
    cout<<"B"<<endl;
    return 0;
  } 
  if(B>A && A>C){
    cout<<"B"<<endl;
    cout<<"A"<<endl;
    cout<<"C"<<endl;
    return 0;
  }  
  if(B>C && C>A){
    cout<<"B"<<endl;
    cout<<"C"<<endl;
    cout<<"A"<<endl;
    return 0;
  }    
  if(C>A && A>B){
    cout<<"C"<<endl;
    cout<<"A"<<endl;
    cout<<"B"<<endl;
    return 0;
  }    
  if(C>B && B>A){
    cout<<"C"<<endl;
    cout<<"B"<<endl;
    cout<<"A"<<endl;
    return 0;
  }    
  return 0;
}