def get_pairs(word):
    """
    Return set of symbol pairs in a word. word is represented as tuple of symbols (symbols being variable-length
    strings)
    """
    pairs = set()
    prev_char = word[0]
    for char in word[1:]:
        pairs.add((prev_char, char))
        prev_char = char
    return pairs

    Return set of symbol pairs in a word. word is represented as tuple of symbols (symbols being variable-length
    strings)
    
dpkd/transformers/src/transformers/models/openai/tokenization_openai.py