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

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

#define NMAX 2000005

char a[NMAX], b[NMAX];
int p[NMAX];
int v[NMAX];

void build(int n) {
    int k = 0;
    for (int i = 2; i <= n; ++i) {
        while (k > 0 && a[i] != a[k + 1]) {
            k = p[k];
        }
        if (a[i] == a[k + 1]) {
            k++;
        }
        p[i] = k;
    }
}

int main() {
    fin.getline(a + 1, NMAX - 1);
    fin.getline(b + 1, NMAX - 1);
    a[0] = 'a';
    b[0] = 'b';

    int n = strlen(a + 1);
    int m = strlen(b + 1);

    build(n);

    int k = 0;
    int nr = 0;
    for (int i = 1; i <= m; ++i) {
        while (k > 0 && a[k + 1] != b[i]) {
            k = p[k];
        }
        if (a[k + 1] == b[i]) {
            k++;
        }
        if (k == n) {
            nr++;
            if (nr <= 1000) {
                v[nr] = i - k;
            }
            k = p[k];
        }
    }

    fout << nr << '\n';
    for (int i = 1; i <= nr && i <= 1000; ++i) {
        fout << v[i] << ' ';
    }
    return 0;
}