import java.util.Scanner;

public class j2 { public static int totalStep(int walkforward, int walkbackward, int totalSteps){ int total= 0; int firstrun = walkforward-walkbackward; int firsttime = walkforward + walkbackward; while(firsttime< totalSteps){ if(firsttime+walkforward> totalSteps|| firsttime + walkforward+walkbackward>totalSteps){ total+= firstrun+(totalSteps-firsttime); firsttime = total; }else { total += walkforward - walkbackward; firsttime = total; } } return total; } public static void main(String args[]){ Scanner scan = new Scanner(System.in); int a = scan.nextInt(); int b = scan.nextInt(); int c = scan.nextInt(); int d = scan.nextInt(); int totalsteps = scan.nextInt(); int StepsN = totalStep(a,b,totalsteps); int StepsB = totalStep(c,d,totalsteps); if(StepsN>StepsB){ System.out.println("Nikky"); }else{ System.out.println("Byron"); } } }