#include <bits/stdc++.h>

using namespace std;
unsigned int h[2000001], b[2000001];
unsigned int baza = 17;
unsigned int cheie;
int i, n, m, contor, raspuns[2000001];
char c[2000000], s[2000000];
int main()
{
    ifstream fin ("strmatch.in");
    ofstream fout ("strmatch.out");
    fin.getline(c, 2000000);
    fin.getline(s, 2000000);
    for (i = strlen(c)-1; i>=0; --i)
        cheie = cheie*baza + c[i];
    for (i = strlen(s)-1; i>=0; --i)
        h[i] = h[i+1]*baza +s[i];
    n = strlen(s);
    m = strlen(c);
    b[0] = 1;
    for (i = 1; i<=n; ++i)
        b[i] = b[i-1]*baza;
    for (i = m-1; i < n; ++i)
    {
        if (cheie == (h[i-m+1]-h[i+1]*b[m]))
        {
            raspuns[contor] = i-m+1;
            ++contor;
        }
    }
    fout << contor << '\n';
    for (i=0; i<contor && i <1001; ++i)
        fout << raspuns[i] << " ";
    return 0;
}