import math
X,Y = map(int,input().split())
counterlist = []
for i in range(X,Y+1):
    counter = 0
    for k in range(math.floor((i/2)**0.5),math.ceil(i**0.5)):
        if (i-k**2)**0.5-math.floor((i-k**2)**0.5)==0.0:
            if k-(i/2)**0.5 == 0.0 or k == 0:
                counter +=0.5
            else:
                counter += 1
        else:
            pass
    counterlist.append(counter)
print(int(max(counterlist))*8)