#include <fstream>
#include <cstring>
#define NMAX 2000005
#define HASH 256
#define MOD 666013
using namespace std;
ifstream in ("strmatch.in");
ofstream out ("strmatch.out");

char s[NMAX], v[NMAX];
int rez[NMAX], n, m, i;

int calculeazahash(char s[], int lg)
{
    int h = 0;
    i = 0;
    while (i < lg)
    {
        h = (h * HASH + s[i]) % MOD;
        ++i;
    }
    return h;
}

int adauga(int h, char ch)
{
    h = (h * HASH + ch) % MOD;
    return h;
}

int scoate(int h, char ch, int put)
{
    h = h - (ch * put) % MOD;
    if (h < 0)
        h = h + MOD;
    return h;
}

int lgput (int a, int n)
{
    int p = 1;
    while (n > 0)
    {
        if (n % 2 == 1)
        {
            p = (long long)p * a % MOD;
        }
        a = (long long)a * a % MOD;
        n = n / 2;
    }
    return p;
}

bool verif(char v[], char s[])
{
    int j = 0;
    while (v[j] && s[j])
    {
        if (v[j] != s[j])
            return 0;
        ++j;
    }
    return 1;
}

int main()
{
    in.getline(s, NMAX);
    in.getline(v, NMAX);

    int shash, vhash, put, cnt = 0;
    n = strlen(s);
    m = strlen(v);
    i = 0;

    shash = calculeazahash(s, n);
    vhash = calculeazahash(v, n - 1);
    //out << shash << " " << vhash << '\n';
    ++i;

    put = lgput(HASH, n - 1);

    while (i <= m)
    {
        vhash = adauga(vhash, v[i - 1]);
        if (shash == vhash)
        {
            if (verif(v + i - n, s))
            {
                cnt++;
                rez[cnt] = i - n;
            }
        }
        //out << shash << " " << vhash << '\n';
        vhash = scoate(vhash, v[i - n], put);
        ++i;
    }

    out << cnt << '\n';
    for (i = 1; i <= cnt; i++)
        out << rez[i] << " ";

    return 0;
}