/* Potrivirea sirurilor algoritmul KMP */
#include <fstream>
#include <string>
#include <vector>
using namespace std;
#define MAX 2000001
ifstream f("strmatch.in");
ofstream g("strmatch.out");

vector<int>Sol;
string a, b;
int Pre[MAX];

void Prefix()
{
    for (int i = 2, K = 0; i < a.length(); i++)
    {
        while (a[K + 1] != a[i] && K != 0) K = Pre[K];
        if (a[K + 1] == a[i])
        {
            K++;
        }
        Pre[i] = K;
    }
}

void KMP()
{
    for (int i = 1, K = 0; i < b.length(); i++)
    {
        while (a[K + 1] != b[i] && K != 0) K = Pre[K];
        if (a[K + 1] == b[i])
        {
            K++;
        }
        if (K == a.length() - 1)
        {
            if (Sol.size() < 1000)
            {
                Sol.push_back(i - a.length() + 1);
            }
            K = Pre[K];
        }
    }
}

int main()
{
    f >> a;
    f >> b;
    a = " " + a;
    b = " " + b;
    Prefix();
    KMP();
    g << Sol.size() << "\n";
    for (int i = 0; i < Sol.size(); i++)
    {
        g << Sol[i] << " ";
    }
}