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import re
import sys
def transform(x, sz):
return pow(x, sz, 20201227)
k1, k2 = [int(x) for x in sys.stdin.read().strip().split("\n")]
# k1,k2 = 5764801,17807724
l1 = 0
while transform(7, l1) != k1:
l1 += 1
l2 = 0
while transform(7, l2) != k2:
l2 += 1
encryption = transform(k1, l2)
assert encryption == transform(k2, l1)
print(encryption)
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