```python
    # Scalar indices (output is rank(params) - 1).
    output[a_0, ..., a_n, b_0, ..., b_n] =
      params[a_0, ..., a_n, indices, b_0, ..., b_n]

    # Vector indices (output is rank(params)).
    output[a_0, ..., a_n, i, b_0, ..., b_n] =
      params[a_0, ..., a_n, indices[i], b_0, ..., b_n]

    # Higher rank indices (output is rank(params) + rank(indices) - 1).

        as `tf.tpu.experimental.embedding.serving_embedding_lookup` which can
        take arbitrary rank of dense and sparse tensor. For ragged tensor,
        though the input tensor remains to be rank 2, the activations now can be
        rank 2 or above by specifying the output shape in the feature config or
        via the build method.

*   Add

a dark Room through a very small hole, the Shadows of things in this
Light will be larger than they ought to be if the Rays went on by the
Bodies in straight Lines, and that these Shadows have three parallel
Fringes, Bands or Ranks of colour'd Light adjacent to them. But if the
Hole be enlarged the Fringes grow broad and run into one another, so
that they cannot be distinguish'd. These broad Shadows and Fringes have

16EB..16F0    ; valid                  ;      ; NV8    # 3.0  RUNIC SINGLE PUNCTUATION..RUNIC BELGTHOR SYMBOL
16F1..16F8    ; valid                                  # 7.0  RUNIC LETTER K..RUNIC LETTER FRANKS CASKET AESC
16F9..16FF    ; disallowed                             # NA   <reserved-16F9>..<reserved-16FF>
1700..170C    ; valid                                  # 3.2  TAGALOG LETTER A..TAGALOG LETTER YA