letters = {}
for i in range (26):
    line = input()
    line = line.split(" ")
    letters[line[0]] = line[1]

n = int(input())
listMorse =[]
for i in range (n):
    word = input()
    morse = ''
    for j in range (len(word)):
        morse += letters[word[j]]
    listMorse.append(morse)

globalMax = 0
counter = 0
for i in range(n-1):
    for j in range (i+1, n):
        if listMorse[i] == listMorse[j]:
            counter += 1
    if counter > globalMax:
        globalMax = counter


if globalMax != 0:
    print (globalMax)
else:
    print(-1)