import core.bitop, std.algorithm, std.ascii, std.bigint, std.conv, std.math,
    std.functional, std.numeric, std.range, std.stdio, std.string, std.random,
    std.typecons, std.container, std.format;

// dfmt off
T lread(T = long)(){return readln.chomp.to!T();}
T[] lreads(T = long)(long n){return generate(()=>readln.chomp.to!T()).take(n).array();}
T[] aryread(T = long)(){return readln.split.to!(T[])();}
void scan(TList...)(ref TList Args){auto line = readln.split();
foreach (i, T; TList){T val = line[i].to!(T);Args[i] = val;}}
alias sread = () => readln.chomp();enum MOD = 10 ^^ 9 + 7;
alias PQueue(T, alias less = "a<b") = BinaryHeap!(Array!T, less);
// dfmt on

void main()
{
    long N = lread();
    auto B = new string[](N);
    foreach (i; 0 .. N)
        B[i] = sread();
    long M = lread();
    auto R = new string[](M);
    foreach (i; 0 .. M)
        R[i] = sread();
    long[string] d;
    foreach (b; B)
        d[b] = d.get(b, 0) + 1;
    foreach (r; R)
        d[r] = d.get(r, 0) - 1;
    long ans = 0;
    foreach (k, v; d)
        ans = ans.max(v);
    writeln(ans);
}
