#include <bits/stdc++.h>

using namespace std;

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

int sub_string[2000005];
string source, query;
vector<int> oc;

void generate_substring()
{
    int querySize = query.size();
    int j = 0, i = 1;
    while (i < querySize)
    {
        if (query[i] == query[j])
        {
            sub_string[i] = j + 1;
            i++, j++;
        }
        else
        {
            if (j != 0)
                j = sub_string[j - 1];
            else
                i++;
        }
    }
}

void compare()
{
    int sourceSize = source.size(), querySize = query.size();
    int sourceIndex = 0, queryIndex = 0;
    while (sourceIndex < sourceSize)
    {
        if (source[sourceIndex] == query[queryIndex])
        {
            if (queryIndex == querySize - 1)
            {
                oc.push_back(sourceIndex - querySize + 1);
                queryIndex = sub_string[queryIndex];
            }
            else
                queryIndex++;
            sourceIndex++;
        }
        else
        {
            if (queryIndex != 0)
                queryIndex = sub_string[queryIndex - 1];
            sourceIndex++;
        }
    }
}

int main()
{
    f >> query >> source;
    generate_substring();
    compare();
    cout << oc.size() << '\n';
    for (int i = 0; i < oc.size() && i < 1000; i++)
    {
        cout<<oc[i]<<' ';
    }
}