# File path to read
file_path = 'text.txt'

# List to store all digit substrings
digit_substrings = []

# Open the file and read line by line
with open(file_path, 'r') as file:
    for line in file:
        current_digits = ""
        # Loop through each character in the line
        for char in line:
            if char.isdigit():  # Check if the character is a digit
                current_digits += char  # Add to current digit substring
            else:
                if current_digits:  # End of a digit substring
                    digit_substrings.append(current_digits)
                    current_digits = ""  # Reset current_digits for next substring

        # Append any remaining digits at the end of the line
        if current_digits:
            digit_substrings.append(current_digits)

# Print the result as space-separated substrings
print(" ".join(digit_substrings))