#include <iostream>
#include <string>
using namespace std;
int main(void){
    int A,B,C;
    cin >> A >> B >> C;
	if(A>B &&B>C){
		cout<<"A"<<endl;
		cout<<"B"<<endl;
		cout<<"C"<<endl;
	}
	if(A>C &&C>B){
		cout<<"A"<<endl;
		cout<<"C"<<endl;
		cout<<"B"<<endl;
	}
	if(B>A&&A>C){
		cout<<"B"<<endl;
		cout<<"A"<<endl;
		cout<<"C"<<endl;
	}
	if(B>C&&C>A){
		cout<<"B"<<endl;
		cout<<"C"<<endl;
		cout<<"A"<<endl;
	}
	if(C>B&&B>A){
		cout<<"C"<<endl;
		cout<<"B"<<endl;
		cout<<"A"<<endl;
	}
	if(C>A&&A>B){
		cout<<"C"<<endl;
		cout<<"A"<<endl;
		cout<<"B"<<endl;
	}
    
    
    
}