from typing import List
import pathlib


def filter_file_existence(c: List[str], files: List[pathlib.Path]) -> List[str]:
    """Filter for files that are not found

    :param c: list of files to find
    :type c: List[str]
    :param files: list of file paths
    :type files: List[pathlib.Path]
    :return: list of file names that are not found
    :rtype: List[str]
    """
    for x in files:
        for cand in c:
            if cand in str(x):
                c.remove(cand)
                break
    return c