code: def twoGramFingerprint(field: str) -> FrozenSet[str]:
      if len(field) > 1:
          return frozenset(
              (
                  "".join(
                      sorted(unique_ngrams(field.replace(" ", ""), 2))
                  ),
              )
          )
      else:
          return frozenset()
  
imports: import re
  from itertools import chain
  from math import copysign, floor, log10
  from typing import Any, FrozenSet, Sequence, Tuple, Union
  from doublemetaphone import doublemetaphone
  from dedupe.cpredicates import initials, ngrams, unique_ngrams
label_desc: Use image node_id 16 for calling a global function with example usage: twoGramFingerprint(field) and returns: frozenset, frozenset