#include<iostream>
#include<stdlib.h>

using namespace std;

int main()
{
    int A,B,C;
    cin>>A>>B>>C;
    if(A>B && A>C){
        cout<<"A"<<endl;
        if(B>C){ cout<<"B\nC"<<endl; }
        else{ cout<<"C\nB"<<endl;}
    }
    if(B>A && B>C){
        cout<<"B"<<endl;
        if(A>C){ cout<<"A\nC"<<endl; }
        else{ cout<<"C\nA"<<endl;}
    }
    if(C>A && C>B){
        cout<<"C"<<endl;
        if(A>B){ cout<<"A\nB"<<endl; }
        else{ cout<<"B\nA"<<endl;}
    }
    return EXIT_SUCCESS;
}