#include <iostream>
#include <vector>
#include <unordered_set>
 
int countOfElement(std::vector<int> listInput1, std::vector<int> listInput2) {
    std::unordered_set<int> set1(listInput1.begin(), listInput1.end());
    std::unordered_set<int> set2(listInput2.begin(), listInput2.end());
    int count = 0;
 
    for (int num : listInput1) {
        if (set2.find(num) == set2.end()) {
            count++;
        }
    }
 
    for (int num : listInput2) {
        if (set1.find(num) == set1.end()) {
            count++;
        }
    }
 
    return count;
}
 
int main() {
    int listInput1_size, listInput2_size;
    std::cin >> listInput1_size;
    std::vector<int> listInput1(listInput1_size);
 
    for (int i = 0; i < listInput1_size; i++) {
        std::cin >> listInput1[i];
    }
 
    std::cin >> listInput2_size;
    std::vector<int> listInput2(listInput2_size);
 
    for (int i = 0; i < listInput2_size; i++) {
        std::cin >> listInput2[i];
    }
 
    int result = countOfElement(listInput1, listInput2);
    std::cout << result << std::endl;
 
    return 0;
}
 

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