local ior = io.input()
local oo, oe, eo, ee = 0, 0, 0, 0
local n = ior:read("*n")
for i = 1, n do
  local a, b = ior:read("*n", "*n")
  if(a % 2 == 0) then
    if(b % 2 == 0) then ee = ee + 1 else eo = eo + 1 end
  else
    if(b % 2 == 0) then oe = oe + 1 else oo = oo + 1 end
  end
end
oo, oe, eo, ee = math.floor(oo / 2), math.floor(oe / 2), math.floor(eo / 2), math.floor(ee / 2)
print((oo + oe + eo + ee) % 2 == 0 and "Bob" or "Alice")