#include <bits/stdc++.h>
using namespace std;
#define print(a) for(auto x : a){cout << x << " ";}
#define scan(a) for(auto & x : a) {cin >> x;}
#define rall(a) a.rbegin() , a.rend()
#define all(a) a.begin() , a.end()
#define int long long
using ll = long long;
using ull = unsigned long long;
using pii = pair<int , int>;
const ll MOD = 1e9 + 7 , INF = 1e18 , LOG = 20 , N = 1e5 + 5;
inline void solve(){
int n, m;
cin >> n >> m;
vector<int> a(n);
scan(a);
vector<int> b(m);
scan(b);
int used = 0;
for(auto x : a){
bool flag = false;
for(int mask = 0; mask < (1 << m); mask++){
if(mask & used) continue;
int sum = 0;
for(int j = 0; j < m; j++){
if(mask & (1 << j)) sum += b[j];
}
if(sum == x){
used |= mask;
flag = true;
break;
}
}
if(!flag){
cout << "NO\n";
return;
}
}
cout << "YES\n";
}
signed main(void){
ios::sync_with_stdio(false);
cin.tie(nullptr);
int tt = 1;
//cin >> tt;
while(tt--){
solve();
}
return 0;
}
