import sys input = sys.stdin.readline sys.setrecursionlimit(10**7) from functools import lru_cache @lru_cache(maxsize=None) def game(X,Y,te,now,P): #print(X,Y) if X+Y10: X%=2 Y%=2 return game(X,Y,te,now,P) if X+Y>K+3: minus=(X+Y-K+3) minusX=minus*X//(X+Y)//2*2 minusY=minus*Y//(X+Y)//2*2 X-=minusX Y-=minusY return game(X,Y,te,now,P) if X+Y==K: if now==P: return te else: return te^1 if te==1: ANS=0 if X>0: if game(X-1,Y,te^1,now,P)==1: ANS=1 if Y>0: if game(X,Y-1,te^1,-now,P)==1: ANS=1 return ANS else: ANS=1 if X>0: if game(X-1,Y,te^1,now,P)==0: ANS=0 if Y>0: if game(X,Y-1,te^1,-now,P)==0: ANS=0 return ANS X,Y,K,P=map(int,input().split()) now=1 if Y%2==-1: now=-1 ANS=game(X,Y,0,now,P) if ANS==0: print("Alice") else: print("Bob")