#include <stdio.h>
#include <stdlib.h>
#include <vector>
#include <string.h>
#define MAX 2000001
#define MOD 100021
#define d 256

int main()
{
    FILE *in = fopen("strmatch.in", "r");
    FILE *out = fopen("strmatch.out", "w");
    char *subsir = (char *)malloc(MAX * sizeof(char));
    char *sir = (char *)malloc(MAX * sizeof(char));
    fscanf(in, "%s%s", subsir, sir);
    int m = strlen(subsir);
    int n = strlen(sir);
    int h_sir = 0;
    int h_subsir = 0;
    int h = 1;
    std::vector<int> aparitii;
    for (int i = 0; i < m - 1; i++)
    {
        h = (d * h) % MOD;
        h_sir = (d * h_sir + sir[i]) % MOD;
        h_subsir = (d * h_subsir + subsir[i]) % MOD;
    }
    h_sir = (d * h_sir + sir[m - 1]) % MOD;
    h_subsir = (d * h_subsir + subsir[m - 1]) % MOD;
    for (int i = 0; i <= n - m; i++)
    {
        if (h_sir == h_subsir)
        {
            int j;
            for (j = 0; j < m; j++)
            {
                if (subsir[j] != sir[i + j])
                    break;
            }
            if (j == m)
                aparitii.push_back(i);
        }
        if (i != n - m)
        {
            h_sir = (d * (h_sir - h * sir[i]) + sir[i + m]) % MOD;
            h_sir = h_sir < 0 ? h_sir + MOD : h_sir;
        }
    }
    fprintf(out, "%lu\n", aparitii.size());
    for (int i = 0; i < aparitii.size(); i++)
    {
        fprintf(out, "%d ", aparitii[i]);
    }
    fclose(in);
    fclose(out);
    return 0;
}