class YetAnotherCardGame:
    def maxCards(self, petr, snuke):
        petr = list(petr)
        snuke = list(snuke)
        petr.sort()
        snuke.sort()

        turn = min(len(petr) * 2, len(snuke) * 2)

        #dp[turn][max] = length
        dp = [[0 for _ in xrange(101)] for _ in xrange(turn + 1)]
        cards = [snuke, petr]
        for i in xrange(1, turn + 1):
            for j in xrange(101):
                for p in cards[i & 1]:
                    if p > j: # おける
                        dp[i][p] = max(dp[i - 1][j] + 1, dp[i][p])
                    dp[i][j] = max(dp[i - 1][j], dp[i][j])

        ans = 0
        for i in xrange(101):
            ans = max(ans, dp[turn][i])
        return ans