Snuke lives at position x on a number line. On this line, there are two stores A and B, respectively at position a and b, that offer food for delivery.  Snuke decided to get food delivery from the closer of stores A and B. Find out which store is closer to Snuke's residence.  Here, the distance between two points s and t on a number line is represented by |s-t|.
a,b,x=map(int,input().split())
da=abs(x-a)
db=abs(x-b)
if da<db:
  print("A")
elif da>db:
  print("B")


x,a,b=map(int,input().split())
da=abs(x-a)
db=abs(x-b)
if da<db:
  print("A")
elif da>db:
  print("B")

