!/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 = []

for _ in range(n): matrix_item = input() matrix.append(matrix_item)

text = "" for col in range(len(matrix[0])): for row in matrix: text += row[col]

result = re.sub(r'(?<=\w)[\W]+(?=\w)', ' ', text)

print(result)

result = re.sub(r'(?<=\w)[\W]+(?=\w)', ' ', text)

print(result)