#include <bits/stdc++.h>
#define ll long long
#define MOD 1000003
#define MOD2 1000007
#define baza 123

using namespace std;

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

vector < ll > rasp;
ll h1, h2, H1, H2, P1, P2;
char sir1[2000005], sir2[2000005];

int main()
{
    ll x, y, i;

    fin.getline(sir1, 2000005);
    fin.getline(sir2, 2000005);

    h1 = 0, H1 = 0, h2 = 0, H2 = 0, P1 = P2 = 1;
    x = strlen(sir1), y = strlen(sir2);
    for(i = 0; i < x; i++)
    {
        h1 = (h1 * baza + sir1[i]) % MOD;
        H1 = (H1 * baza + sir1[i]) % MOD2;
    }

    for(i = 0; i < x; i++)
    {
        h2 = (h2 * baza + sir2[i]) % MOD;
        H2 = (H2 * baza + sir2[i]) % MOD2;
        if(i != 0) P1 = (P1 * baza) % MOD, P2 = (P2 * baza) % MOD2;
    }

    if(h1 == h2 && H1 == H2) rasp.push_back(0);
    for(i = x; i < y; i++)
    {
      h2=((h2-(sir2[i-x]*P1)%MOD+MOD)*baza+sir2[i])%MOD;
      H2=((H2-(sir2[i-x]*P2)%MOD2+MOD2)*baza+sir2[i])%MOD2;

      if(h1 == h2 && H1 == H2) rasp.push_back(i-x+1);
    }

    fout << rasp.size() << '\n';
    for(int i:rasp) fout << i << ' ';

    return 0;
}