#include <bits/stdc++.h>
#define name "cownav"
#define fi(i,a,b) for(int i = a; i <= b; i++)
#define fid(i,a,b) for(int i = a; i >= b; i--)
#define ll long long
#define f first
#define se second
#define pii pair<int, int>
#define getbit(i, j) ((i >> j) & 1)
#define pb push_back
#define all(v) v.begin(), v.end()
#define maxn
const int M = 1e9 + 7;
using namespace std;
int n, m, a[22], b[22];
pii dp[1 << 21];
signed main(){
ios_base::sync_with_stdio(0);
cin.tie(NULL);
// freopen(name".in", "r", stdin);
// freopen(name".out", "w", stdout);
cin >> n >> m;
fi(i, 1, n) cin >> a[i];
fi(i, 1, m) cin >> b[i];
fi(i, 1, (1 << m) - 1) dp[i] = {-1, 0};
dp[0] = {1, 0};
bool ok = 0;
fi(msk, 0, (1 << m) - 1) if(dp[msk].f != -1){
int id = dp[msk].f, w = dp[msk].se;
if(id == n + 1){ok = 1; break;}
fi(i, 0, m - 1) if(getbit(msk, i) == 0){
if(b[i + 1] + w == a[id]){
dp[msk + (1 << i)] = max(dp[msk + (1 << i)], {id + 1, 0});
}
else dp[msk + (1 << i)] = max(dp[msk + (1 << i)], {id, w + b[i + 1]});
}
}
if(ok) cout << "YES";
else cout << "NO";
}
