d8 = (d7 ^ q8) * H_PRIME ^ HASH_LEN;
d9 = d8 & ~127;
d9 %= 1001; if (d9 < 0) d9 += 1001;
if (d9 < 500 - 127) continue;
if (d9 > 500 + 127) continue;
dist = d9 < 500 ? 500 - d9 : d9 - 500;
q9 = (d8 & 127) ^ dist;
if (q9 == 0 || q9 == 10 || q9 == 13) continue;