#include<iostream>
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(B>=A&&A>=C)    cout << "B\nA\nC\n";
    else if(C>=B&&B>=A)    cout << "C\nB\nA\n";
    else if(C>=A&&A>=B)    cout << "C\nA\nB\n";
    else if(B>=C&&C>=A)    cout << "B\nC\nA\n";
    else    cout << "A\nC\nB\n";
}