from typing import Dict
from typing import Tuple


def add_ascii_keys(data) -> Dict[Tuple[int, ...], str]:
    """Update the data with ascii keys

    >>> data = add_ascii_keys({})
    >>> assert data[(48,)] == '0'
    >>> assert data[(66,)] == 'B'
    >>> assert data[(99,)] == 'c'
    """
    # See previous function for previous key, value pairs
    for i in range(32):
        data[(i + 1,)] = f"Ctrl {chr( ord('A') + i)}"
    for i in range(32, 127):
        data[(i,)] = f"{chr(i)}"
    return data