import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sn = new Scanner(System.in);
        
        String s = sn.nextLine();
        
        if(s.equals("ABC")) {
            System.out.print("ARC");
        } else {
            System.out.print("ABC");
        }
    }
} import java.util.*; util.* java public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sn = new Scanner(System.in);
        
        String s = sn.nextLine();
        
        if(s.equals("ABC")) {
            System.out.print("ARC");
        } else {
            System.out.print("ABC");
        }
    }
} Main public static void main(String[] args) throws Exception {
        Scanner sn = new Scanner(System.in);
        
        String s = sn.nextLine();
        
        if(s.equals("ABC")) {
            System.out.print("ARC");
        } else {
            System.out.print("ABC");
        }
    } main {
        Scanner sn = new Scanner(System.in);
        
        String s = sn.nextLine();
        
        if(s.equals("ABC")) {
            System.out.print("ARC");
        } else {
            System.out.print("ABC");
        }
    } Scanner sn = new Scanner(System.in); sn new Scanner(System.in) String s = sn.nextLine(); s sn.nextLine() sn.nextLine sn if(s.equals("ABC")) {
            System.out.print("ARC");
        } else {
            System.out.print("ABC");
        } s.equals("ABC") s.equals s "ABC" {
            System.out.print("ARC");
        } System.out.print("ARC") System.out.print System.out System System.out "ARC" {
            System.out.print("ABC");
        } System.out.print("ABC") System.out.print System.out System System.out "ABC" String[] args args public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sn = new Scanner(System.in);
        
        String s = sn.nextLine();
        
        if(s.equals("ABC")) {
            System.out.print("ARC");
        } else {
            System.out.print("ABC");
        }
    }
} public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sn = new Scanner(System.in);
        
        String s = sn.nextLine();
        
        if(s.equals("ABC")) {
            System.out.print("ARC");
        } else {
            System.out.print("ABC");
        }
    }
} Main
import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sn = new Scanner(System.in);
        
        String s = sn.nextLine();
        
        if(s.equals("ABC")) {
            System.out.print("ARC");
        } else {
            System.out.print("ABC");
        }
    }
}
