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