H.py

fs = input()
ss = input()

maxx1 = int(fs)
minn1 = maxx1
maxx2 = int(ss)
minn2 = maxx2

for i in range(1, len(fs)):
    cur = fs[i:] + fs[:i]
    if(cur[0] != '0'):
        cur = int(cur)
        maxx1 = max(maxx1, cur)
        minn1 = min(minn1, cur)

for i in range(1, len(ss)):
    cur = ss[i:] + ss[:i]
    if(cur[0] != '0'):
        cur = int(cur)
        maxx2 = max(maxx2, cur)
        minn2 = min(minn2, cur)

fir = abs(maxx1 - minn2)
ser = abs(maxx2 - minn1)

print(max(fir, ser))