```python
from typing import List, Tuple

def line_clusters(stops: List[str],,:
    clusters = []
    for stop in stops:
        if not clusters or stop not in clusters[0][ clusters.append([stop])
        else(cl[clusters.index(stop)])
        clusters[clusters.index(stop)].        clusters[clusters.index(stop) += [stop]
[clusters.index(stop) += [stop]

