#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#pragma GCC optimize ("O1")
#pragma GCC optimize ("O2")
#pragma GCC optimize ("O3")
#pragma GCC optimize ("Ofast")
#pragma GCC optimize ("unroll-loops")
#pragma GCC target ("avx2")
using namespace std;
using namespace __gnu_pbds;
#define ordered_set tree <long long, null_type, less<long long>, rb_tree_tag, tree_order_statistics_node_update>
#define lsb(x)(x & (-x))
const int max_size = 2e6 + 20, INF = 1e9 + 2;
string a, b;
int p[max_size];
void kmp ()
{
int q = 0;
for (int i = 2; i < a.size(); i++)
{
while (q > 0 && a[q + 1] != a[i])
{
q = p[q];
}
if (a[q + 1] == a[i])
{
q++;
}
p[i] = q;
}
}
void solve ()
{
cin >> a >> b;
a = '$' + a;
b = '$' + b;
kmp();
vector <int> pl;
int ans = 0, q = 0;
for (int i = 1; i < b.size(); i++)
{
while (q > 0 && a[q + 1] != b[i])
{
q = p[q];
}
if (a[q + 1] == b[i])
{
q++;
}
if (q == a.size() - 1)
{
ans++;
if (ans <= 1000)
{
pl.push_back(i - a.size() + 1);
}
}
}
cout << ans << '\n';
for (auto f : pl)
{
cout << f << " ";
}
cout << '\n';
}
signed main ()
{
#ifdef LOCAL
freopen("test.in", "r", stdin);
freopen("test.out", "w", stdout);
#else
freopen("strmatch.in", "r", stdin);
freopen("strmatch.out", "w", stdout);
#endif // LOCAL
ios_base::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
long long tt;
//cin >> tt;
tt = 1;
while (tt--)
{
solve();
}
return 0;
}