#include <bits/stdc++.h>
using namespace std;
#define pb push_back

ifstream f("strmatch.in");
ofstream g("strmatch.out");

int n, m, t;
string a, b;
vector<int> r, p;

int main()
{
    f >> a >> b;
    p.resize(n+3);
    n = a.size(); m = b.size();
    a = '#' + a; b = '#' + b;
    for (int i = 2; i <= n; i++){
        int k = p[i-1];
        while (k && a[i] != a[k+1]) k = p[k];
        if (a[i] == a[k+1]) k++;
        p[i] = k;
    }
    int k = 0;
    for (int i = 1; i <= m; i++){
        while (k && b[i] != a[k+1]) k = p[k];
        if (b[i] == a[k+1]) k++;
        if (k == n){
            t++; k = p[n];
            if (t <= 1000) r.pb(i-n);
        } 
    }
    g << t << '\n';
    for (auto it: r) g << it << ' ';

    return 0;
}