#include <iostream>
#include <stdio.h>
#include <algorithm>
#include <vector>
#include <cmath>
#include <string>
#include<sstream>
#include <queue>
#include <limits>
#include <cstdlib>
#include <deque>
#include <map>

using namespace std;

int main() {

	int A=0;
	int B =0;
	int C=0;


	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;
	}



	return 0;
}