#include <bits/stdc++.h>
#define ull unsigned long long
#define FILES freopen("strmatch.in","r",stdin);\
              freopen("strmatch.out","w",stdout);
#define CMAX 1000000
#define fastio std::ios_base::sync_with_stdio(NULL),cin.tie(NULL),cout.tie(NULL);
#define mp make_pair
#define INF 999999999999999
#define mod 1000000007
#define ll long long
#define MAX 1000
#define SMAX 500000
#define pb push_back
#define add emplace_back
#define void inline void
using namespace std;
string a,b;
int main()
{
    fastio
    FILES
    int cnt = 0;
    cin >> a >> b;
    if(a.size() > b.size())
    {
        cout << 0;
        exit(0);
    }
    deque<char> dq,dq2;
    string k;
    for(int i = 0;i < a.size(); ++i) dq.push_back(b[i]),dq2.push_back(a[i]);
    vector<int>pz;
    for(int i = a.size();i < b.size(); ++i)
    {
        if(dq2 == dq) cnt++,pz.add(i-a.size());
        dq.pop_front(),dq.push_back(b[i]);
    }
    if(dq == dq2) cnt++,pz.add(b.size()-a.size());
    cout << min(cnt,1000) << '\n';
    for(int i = 0;i < min(cnt,1000); ++i) cout << pz[i] << ' ';

}