def fibonacci(n):
    a, b = 0, 1
    seq = []
    for _ in range(n):
        seq.append(a)
        a, b = b, a + b
    return seq

class Tokenizer:
    def __init__(self, vocab_size=1000):
        self.vocab_size = vocab_size

# JavaScript Example
function sum(arr) {
  return arr.reduce((a, b) => a + b, 0);
}

# JSON-like structure
config = {"model": {"layers": 12, "hidden": 768}, "tokenizer": "hybrid"}
