#include <cstdio>
#include <cstring>
#include <vector>

using namespace std;

char text[2000200];
char cuvant[2000200];
int repetare[2000200];
int contor = 0;

void citire()
{
    fgets(cuvant, 2000200, stdin);
    fgets(text, 2000200, stdin);

    text[strlen(text) - 1] = 0;
    cuvant[strlen(cuvant) - 1] = 0;
}

void generareRepetare()
{
    int l = strlen(cuvant);
    int j = 0;

    for(int i = 1; i < l; i++)
    {
        while(j > 0 && cuvant[j] != cuvant[i])
        {
            j = repetare[j - 1];
        }
        if(cuvant[j] == cuvant[i])
        {
            j++;
        }
        repetare[i] = j;
    }
}

vector<int> solutii;
bool ok = false;
int nr = 0;

void parcurgere()
{
    int l = strlen(text);
    int j = 0;

    int i = 0;

    int lungimeCuvant = strlen(cuvant);

    while(true)
    {
        if(i == l)
        {
            break;
        }

        if(text[i] == cuvant[j])
        {
            i++;
            j++;

            if(j == lungimeCuvant)
            {
                nr++;
                contor++;
                if(contor <= 1000)
                {
                    solutii.push_back(i - lungimeCuvant);
                    j = repetare[j - 1];
                }
            }
        }
        else if(j > 0)
        {
            j = repetare[j - 1];
        }
        else
        {
            i++;
        }
    }

}

void afisare()
{
    printf("%d\n", nr);

    if(nr > 1000)
    {
        nr = 1000;
    }

    for(int i = 0; i < nr; i++)
    {
        printf("%d ", solutii[i]);
    }
}

int main()
{
    freopen("strmatch.in", "r", stdin);
    freopen("strmatch.out", "w", stdout);

    citire();
    generareRepetare();
    parcurgere();
    afisare();


    return 0;
}