blob: 59474ffd6fdf2774cbe521a179061592d948bee0 (
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table = "fZodR9XQDSUm21yCkr6zBqiveYah8bt4xsWpHnJE7jL5VG3guMTKNPAwcF"
tr = {}
for i in range(58):
tr[table[i]] = i
s = [11, 10, 3, 8, 4, 6]
xor = 177451812
add = 8728348608
def dec(x) -> int:
r = 0
for i in range(6):
r += tr[x[s[i]]] * 58 ** i
return (r - add) ^ xor
def enc(x) -> str:
x = (x ^ xor) + add
r = list("BV1 4 1 7 ")
for i in range(6):
r[s[i]] = table[x // 58 ** i % 58]
return "".join(r)
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