#include <fstream>
#include <cstring>
using namespace std;

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

const int maxn = 2000002;

char A[maxn], B[maxn];
int F[maxn], pos[1000]; // Failure function
int M, N;

void buildFunction()
{
    int i = 1;
    int j = 0;
    while (i < M)
    {
        if (A[i] == A[j])
        {
            F[i] = j + 1;
            i++;
            j++;
        }
        else if (j > 0) j = F[j - 1];
        else i++;
    }
}

int KMPmatch(int start)
{
    int j = 0;
    int i = start;
    while (i < N)
    {
        if (A[j] == B[i]) {
            if (j == M - 1) return i - M + 1;
            i++;
            j++;
        } else if (j > 0) j = F[j-1];
        else i++;
    }
    return -1;
}

int main()
{
    in.getline(A, maxn);
    in.getline(B, maxn);
    N = strlen(B);
    M = strlen(A);
    buildFunction();
    int poz = 0, k = 0;
    while (k < 1000)
    {
        poz = KMPmatch(poz+M-1);
        if (poz >= 0) pos[k++] = poz;
        else break;
    }
    out << k << '\n';
    for (int i = 0; i < k; i++) out << pos[i] << ' ';

    return 0;
}