#include<fstream>
#include<string>
#include<vector>
using namespace std;

int prefix[2000010];

vector<int> v;

void make_prefix(string match)
{
    prefix[0] = 0;

    for (int i = 1; i < match.size(); ++i)
    {
        int s = prefix[i - 1];

        while (s != 0 && match[s] != match[i])
        {
            s = prefix[s - 1];
        }

        if (match[s] == match[i])
        {
            prefix[i] = s + 1;
        }
    }
}

void print_matches(string search, string match)
{
    int last_state = 0;
    for (int i = 0; i < search.size(); ++i)
    {
        while (last_state != 0 && search[i] != match[last_state])
        {
            last_state = prefix[last_state - 1];
        }

        if (search[i] == match[last_state])
        {
            last_state++;

            if (last_state == match.size())
            {
                last_state = prefix[last_state - 1];

                if (v.size() < 1000)
                {
                    v.push_back(i - match.size() + 1);
                }
            }
        }
    }
}

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

int main()
{
    string match;
    string search;

    in >> match >> search;

    make_prefix(match);

    print_matches(search, match);

    out << v.size() << "\n";

    for (int i = 0; i < v.size(); ++i)
    {
        cout << v[i] << " ";
    }
}