#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;
 
int main(){
	int A, B, C;
	cin >> A >> B >> C;
	if(A > B && B > C){
		cout << "A\nB\nC\n";
	}else if(A > C && C > B){
		cout << "A\nC\nB\n";
	}else if(B > A && A > C){
		cout << "B\nA\nC\n";
	}else if(B > C && C > A){
		cout << "B\nC\nA\n";
	}else if(C > A && A > B){
		cout << "C\nA\nB\n";
	}else if(C > B && B > A){
		cout << "C\nB\nA\n";
	}
}