import re
import sys

inFile = sys.argv[1]
outFile = sys.argv[2]

with open(inFile, "r", encoding="utf-8") as sampleCheck, open(outFile, 'w', encoding='utf-8') as outputFile:
    pattern = re.compile(r'\b\d+\b')

    for line in sampleCheck:
        matches = re.findall(pattern, line)

        if matches:
            result = ' '.join(matches)
            outputFile.write(result + '\n')
            print(result)