Problem:
Search II

You are given a sequence of n integers S and a sequence of different q integers T. Write a program which outputs C, the number of integers in T which are also in the set S.

Input

In the first line n is given. In the second line, n integers are given. In the third line q is given. Then, in the fourth line, q integers are given.

Output

Print C in a line.

Constraints

Elements in S is sorted in ascending order

n ≤ 100000

q ≤ 50000

0 ≤ an element in S ≤ 109

0 ≤ an element in T ≤ 109

Sample Input 1

5
1 2 3 4 5
3
3 4 1

Sample Output 1

3

Sample Input 2

3
1 2 3
1
5

Sample Output 2

0

Sample Input 3

5
1 1 2 2 3
2
1 2

Sample Output 3

2

Notes

Solution in Ruby (judge verdict: Wrong Answer)

n=gets.chomp.to_i
t = gets.chomp.split(" ").map{|u|u.to_i}
t.sort!
gets
b = gets.chomp.split(" ").map{|u|u.to_i}
ans = 0
b.each do |d|
  r = n-1
  l = 0
  mid = 999999999
  while(true)
    mid = l + (r-l)/2
    if (t[mid] == d)
      ans += 1
      break
    elsif(t[mid] > d)
      r = mid
    else
      l = mid
    end
    break if r == l
    r-=1 if(r == l+1)
  end
end
p ans