It is a valid encoding, even if no longer issued by most encoders.

name              old speed      new speed      delta
WordsDecode1e1-8   525MB/s ± 0%   504MB/s ± 1%  -4.04%   (p=0.000 n=9+10)
WordsDecode1e2-8  1.23GB/s ± 0%  1.23GB/s ± 1%    ~      (p=0.678 n=10+9)
WordsDecode1e3-8  1.54GB/s ± 0%  1.53GB/s ± 1%  -0.75%   (p=0.000 n=10+9)
WordsDecode1e4-8  1.53GB/s ± 0%  1.51GB/s ± 3%  -1.46%   (p=0.000 n=9+10)
WordsDecode1e5-8   793MB/s ± 0%   777MB/s ± 2%  -2.01%   (p=0.017 n=9+10)
WordsDecode1e6-8   917MB/s ± 1%   917MB/s ± 1%    ~      (p=0.473 n=8+10)
WordsEncode1e1-8   641MB/s ± 2%   641MB/s ± 0%    ~      (p=0.780 n=10+9)
WordsEncode1e2-8   583MB/s ± 0%   580MB/s ± 0%  -0.41%   (p=0.001 n=10+9)
WordsEncode1e3-8   647MB/s ± 1%   648MB/s ± 0%    ~      (p=0.326 n=10+9)
WordsEncode1e4-8   442MB/s ± 1%   452MB/s ± 0%  +2.20%   (p=0.000 n=10+8)
WordsEncode1e5-8   355MB/s ± 1%   355MB/s ± 0%    ~      (p=0.880 n=10+8)
WordsEncode1e6-8   433MB/s ± 0%   434MB/s ± 0%    ~       (p=0.700 n=8+8)
RandomEncode-8    14.2GB/s ± 3%  14.2GB/s ± 3%    ~      (p=0.780 n=10+9)
_UFlat0-8         2.18GB/s ± 1%  2.19GB/s ± 0%    ~      (p=0.447 n=10+9)
_UFlat1-8         1.40GB/s ± 2%  1.41GB/s ± 0%  +0.73%   (p=0.043 n=9+10)
_UFlat2-8         23.4GB/s ± 3%  23.5GB/s ± 2%    ~      (p=0.497 n=9+10)
_UFlat3-8         1.90GB/s ± 0%  1.91GB/s ± 0%  +0.30%    (p=0.002 n=8+9)
_UFlat4-8         13.9GB/s ± 2%  14.0GB/s ± 1%    ~      (p=0.720 n=9+10)
_UFlat5-8         1.96GB/s ± 1%  1.97GB/s ± 0%  +0.81%   (p=0.000 n=10+9)
_UFlat6-8          813MB/s ± 0%   814MB/s ± 0%  +0.17%   (p=0.037 n=8+10)
_UFlat7-8          783MB/s ± 2%   785MB/s ± 0%    ~       (p=0.340 n=9+9)
_UFlat8-8          859MB/s ± 0%   857MB/s ± 0%    ~       (p=0.074 n=8+9)
_UFlat9-8          719MB/s ± 1%   719MB/s ± 1%    ~      (p=0.621 n=10+9)
_UFlat10-8        2.84GB/s ± 0%  2.84GB/s ± 0%  +0.19%   (p=0.043 n=10+9)
_UFlat11-8        1.05GB/s ± 1%  1.05GB/s ± 0%    ~       (p=0.523 n=9+8)
_ZFlat0-8         1.04GB/s ± 2%  1.04GB/s ± 0%    ~       (p=0.222 n=9+9)
_ZFlat1-8          535MB/s ± 0%   534MB/s ± 0%    ~       (p=0.059 n=9+9)
_ZFlat2-8         15.6GB/s ± 3%  15.7GB/s ± 1%    ~      (p=0.720 n=9+10)
_ZFlat3-8          723MB/s ± 0%   740MB/s ± 3%  +2.36%   (p=0.034 n=8+10)
_ZFlat4-8         9.16GB/s ± 1%  9.20GB/s ± 1%    ~       (p=0.297 n=9+9)
_ZFlat5-8          987MB/s ± 1%   991MB/s ± 0%    ~       (p=0.167 n=9+8)
_ZFlat6-8          378MB/s ± 2%   379MB/s ± 0%    ~       (p=0.334 n=9+8)
_ZFlat7-8          350MB/s ± 2%   352MB/s ± 0%  +0.60%    (p=0.014 n=9+8)
_ZFlat8-8          397MB/s ± 0%   396MB/s ± 1%    ~      (p=0.965 n=8+10)
_ZFlat9-8          328MB/s ± 0%   327MB/s ± 1%    ~       (p=0.409 n=8+9)
_ZFlat10-8        1.33GB/s ± 0%  1.33GB/s ± 1%    ~      (p=0.356 n=9+10)
_ZFlat11-8         605MB/s ± 0%   605MB/s ± 1%    ~       (p=0.743 n=9+8)