s = input()
i = s.find(' ')
n = int(s[0: i])
m = int(s[i + 1: len(s)])
strings = []
for i in range(n):
    s = input()
    strings.append(s[0: m + 1])
pn = int(input())

passwords = ['']

def generate_password(i = 0, j = 0, n = 0, m = 0, password = ''):
    if ((i < n) or (j < m)):
        password = password + strings[i][j]
        if (i < n):
            generate_password(i + 1, j, n, m, password)
        if (j < m):
            generate_password(i, j + 1, n, m, password)
    else:
        passwords.append(password)
        print(password)

generate_password(0, 0, n, m, '')

passwords