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It might be incrementally generating codes. So it's only at 4 unique characters because only those many URLs have been generated so far; once all the 4-characte
by chetan51 15y ago
It might be incrementally generating codes. So it's only at 4 unique characters because only those many URLs have been generated so far; once all the 4-character codes have been exhausted, it would start using 5-character codes.