import sys

# detect numbers. separate numbers by spaces
def solve(lines):
    res = []

    j = 0
    for l in lines:
        numbers = []
        for i in range(len(l)):
            c = l[i]
            
            if j > 0 and not c.isdigit():
                numbers.append(l[i-j:i])
            j = j+1 if (c.isdigit() and c.isascii()) else 0

        if numbers:
            res.append(' '.join(numbers))
    return '\n'.join(res)

if __name__ == "__main__":
    lines = []
    
    fp = sys.argv[1]
    with open(fp, encoding="utf-8") as f:
        lines = f.readlines()
    sol = solve(lines)
    with open("./polish_wiki_excerpt.out", 'w', encoding="utf-8") as f:
        f.writelines(sol)
        f.write('\n')  # it expects for file to end with newline :)