#include <bits/stdc++.h>
#ifdef LOCAL
#include "debug/debug.hpp"
#else
#define print(...)
#endif
using ll = long long;
using ld = long double;
using ull = unsigned long long;
#define str string
#define all(v) v.begin(), v.end()
#define fi first
#define se second
#define ent cout << "\n";
#define sz(v) ll(v.size())
using namespace std;
const long long MOD = 1e9 + 7, inf = 1e18;
void solve() {
ll n, m;
cin >> n >> m;
ll a[n + 17];
ll a2[n + 17];
for (ll i = 1; i <= n; i++) {
cin >> a2[i];
a[a2[i]] = i;
}
ll b[m + 17];
for (ll i = 1; i <= m; i++) {
cin >> b[i];
}
vector<ll> ans;
for (ll i = 1; i + n - 1 <= m; i++) {
ll ok = 1;
for (ll j = i; j - i + 2 <= n; j++) {
if (a[j - i + 1] < a[j - i + 2] && b[j] > b[j + 1]) {
ok = 0;
}
if (a[j - i + 1] > a[j - i + 2] && b[j] < b[j + 1]) {
ok = 0;
}
}
if (ok) {
ans.push_back(i);
}
}
cout << sz(ans) << '\n';
for (auto c : ans) {
cout << c << ' ';
}
ent;
}
int32_t main() {
#ifdef ONLINE_JUDGE
// freopen("input.txt","r",stdin);
// freopen("output.txt","w",stdout);
#endif
ios_base::sync_with_stdio(false), cin.tie(0), cout.tie(0);
ll ttest = 1;
// cin >> ttest;
for (ll test_number = 1; test_number <= ttest; test_number++) {
solve();
}
return 0;
}
