#include <iostream>
#include <string>
#include <vector>
using namespace std;

int main() {
    int a,b,c;
    cin >> a >> b >> c;
    if(a > b){
        if(b > c)cout << "A\nB\nC";
        else if(a > c)cout << "A\nC\nB";
        else cout << "C\nA\nB";
    }
    else{
        if(a > c) cout << "B\nA\nC";
        else if(b > c) cout << "B\nC\nA";
        else cout << "C\nB\nA";
    }
    return 0;
}