from typing import Sequence
from typing import List


def read_present_files(paths: Sequence[str]) -> str:
    """Read the content of those files that are present."""
    contents: List[str] = []
    for path in paths:
        try:
            with open(path, "r") as f:
                contents += ["\n".join(map(str.strip, f.readlines()))]
        except FileNotFoundError:
            continue
    return "\n\n".join(contents)