import sys

def solve(lines):
    # from 0 to n-6
    date_f = "19XX r."
    date_l = len(date_f)
    
    res = []
    for l in lines:
        # acc = []

        j = 0
        for i in range(len(l)):
            c = l[i]

            if j == date_l:
                # acc.append(l[i-j: i])
                res.append(l)
                break
            elif c == date_f[j] \
                or (j in (2, 3) and c.isdigit()):
                j += 1
                continue

            j = 0

        # res.append(" ".join(acc))
    # return "\n".join(res)
    return "".join(res)

# 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 :)