#include <iostream>
using namespace std;
int main(){
    int a,b,c;
    cin>>a>>b>>c;
    string ans;
    if(a>b&&a>c){
        ans=b>c?"ABC":"ACB";
    }else if(b>a&&b>c){
        ans=a>c?"BAC":"BCA";
    }else{
        ans=a>b?"CAB":"CBA";
    }
    cout<<ans[0]<<"\n"<<ans[1]<<"\n"<<ans[2]<<"\n";
}