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|.
x,a,b = input().split()
x = int(x)
a = int(a)
b = int(b)
if (x-a)^2 <= (x-b)^2 :
 print(a)
else :
 print(b)
x,a,b = input().split()
x = int(x)
a = int(a)
b = int(b)
if abs(x-a) <= abs(x-b) :
  print("A")
else :
  print("B")