def find_max_digit_substrings(file_path):
    try:
        with open(file_path, 'r', encoding='utf-8') as file:
            for line in file:
                max_digit_substrings = []
                current_digits = ""

                for char in line:
                    if char.isdigit():
                        current_digits += char
                    else:
                        if current_digits:
                            max_digit_substrings.append(current_digits)
                            current_digits = ""

                if current_digits:
                    max_digit_substrings.append(current_digits)

                if max_digit_substrings:
                    print(" ".join(max_digit_substrings))
    except Exception as e:
        print(f"An error occurred: {e}")

find_max_digit_substrings("TaskA04\simple.in")
find_max_digit_substrings("TaskA04\polish_wiki_excerpt.in")