#!/usr/bin/env python3

import sys


def main():

    if len(sys.argv) != 2:
        print('Usage: python3 matrix.py <matrix.txt>')
        sys.exit(1)

    with open(sys.argv[1], 'r') as f:
        lines = f.readlines()

    matrix = [list(map(int, line.strip().split())) for line in lines]

    # get value of upper-left element
    _ = matrix[0][0]

    # change element in last column of first row to 8
    matrix[0][9] = 8

    # print the matrix
    print_matrix(matrix)


def print_matrix(matrix):
    for row in matrix:
        print(' '.join(map(str, row)))


if __name__ == '__main__':
    main()