from collections import defaultdict
from typing import Dict, List


list_of_dicts = [
    {"name": "Bilbo", "age": 60},
    {"name": "Frodo", "age": 50},
    {"name": "Samwise", "age": 60},
]


def merge_dicts(list_of_dicts: List[Dict[str, str]]) -> Dict[str, List[str]]:
    """
    {'name': ['Bilbo', 'Frodo', 'Samwise'], 'age': [60, 50, 60]}
    """
    result = defaultdict(list)
    for d in list_of_dicts:
        for k, v in d.items():
            result[k].append(v)
    return result