#include<cstdio>
#include<cstring>
#include<algorithm>
using namespace std;
int n,m,a[101],b[101],k,c[16],d[16];
int ans,mark[101],tot;
signed main()
{
	scanf("%d %d",&n,&m);
	for(int i=0;i<m;i++)
		scanf("%d %d",&a[i],&b[i]);
	scanf("%d",&k);
	for(int i=0;i<k;i++)
		scanf("%d %d",&c[i],&d[i]);
	for(int i=0;i<(1<<k);i++)
	{
		memset(mark,0,sizeof(mark));
		for(int j=0;j<k;j++)
			if(((i>>j)&1)==0)
				mark[c[j]]++;
			else
				mark[d[j]]++;
		tot=0;
		for(int j=0;j<m;j++)
			if(mark[a[j]]&&mark[b[j]])
				tot++;
		ans=max(ans,tot);
	}
	printf("%d",ans);
}
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using uint = unsigned int;
#define rep(i,n) for(int i=0;i<int(n);i++)
#define rep1(i,n) for(int i=1;i<=int(n);i++)
#define per(i,n) for(int i=int(n)-1;i>=0;i--)
#define per1(i,n) for(int i=int(n);i>0;i--)
#define all(c) c.begin(),c.end()
#define si(x) int(x.size())
#define pb emplace_back
#define fs first
#define sc second
template<class T> using V = vector<T>;
template<class T> using VV = vector<vector<T>>;
template<class T,class U> void chmax(T& x, U y){if(x<y) x=y;}
template<class T,class U> void chmin(T& x, U y){if(y<x) x=y;}
template<class T> void mkuni(V<T>& v){sort(all(v));v.erase(unique(all(v)),v.end());}
template<class T> int lwb(const V<T>& v, const T& a){return lower_bound(all(v),a) - v.begin();}
template<class S,class T> ostream& operator<<(ostream& o,const pair<S,T> &p){
	return o<<"("<<p.fs<<","<<p.sc<<")";
}
template<class T> ostream& operator<<(ostream& o,const vector<T> &vc){
	o<<"{";
	for(const T& v:vc) o<<v<<",";
	o<<"}";
	return o;
}
constexpr ll TEN(int n) { return (n == 0) ? 1 : 10 * TEN(n-1); }

#ifdef LOCAL
#define show(x) cerr << "LINE" << __LINE__ << " : " << #x << " = " << (x) << endl
void dmpr(ostream& os){os<<endl;}
template<class T,class... Args>
void dmpr(ostream&os,const T&t,const Args&... args){
	os<<t<<" ~ ";
	dmpr(os,args...);
}
#define shows(...) cerr << "LINE" << __LINE__ << " : ";dmpr(cerr,##__VA_ARGS__)
#define dump(x) cerr << "LINE" << __LINE__ << " : " << #x << " = {";  \
	for(auto v: x) cerr << v << ","; cerr << "}" << endl;
#else
#define show(x) void(0)
#define dump(x) void(0)
#define shows(...) void(0)
#endif

int main(){
	cin.tie(0);
	ios::sync_with_stdio(false);		//DON'T USE scanf/printf/puts !!
	cout << fixed << setprecision(20);

	int N,K; cin >> N >> K;
	V<int> cnt(N+1);
	rep(i,N){
		int x; cin >> x; cnt[x]++;
	}
	int ans = 0;
	rep(k,K){
		rep(i,N+1){
			if(cnt[i]){
				cnt[i]--;
			}else{
				ans += i;
				break;
			}
		}
	}
	cout << ans << endl;
}
