• + 0 comments

    !/bin/python3

    import math import os import random import re import sys

    first_multiple_input = input().rstrip().split()

    n = int(first_multiple_input[0])

    m = int(first_multiple_input[1])

    matrix = [] pattern = r"(?<=[A-Za-z0-9])[^A-Za-z0-9]+(?=[A-Za-z0-9])" for _ in range(n): matrix_item = input() matrix.append(matrix_item) zipped = list(zip(*matrix)) final = "".join(ch for tup in zipped for ch in tup)

    output = re.sub(pattern," ",final) print(output)