#include <bits/stdc++.h>

using namespace std;
const int m1 = 100000007;
 int h[2000001], b[2000001];
int baza = 17;
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])%m1;
    for (i = strlen(s)-1; i>=0; --i)
        h[i] = (h[i+1]*baza +s[i])%m1;
    n = strlen(s);
    m = strlen(c);
    b[0] = 1;
    for (i = 1; i<=n; ++i)
        b[i] = (b[i-1]*baza)%m1;
    for (i = m-1; i < n; ++i)
    {
        if (cheie == ((h[i-m+1]-(h[i+1]*b[m])%m1)%m1))
        {
            raspuns[contor] = i-m+1;
            ++contor;
        }
    }
    fout << contor << '\n';
    for (i=0; i<contor; ++i)
        fout << raspuns[i] << " ";
    return 0;
}