#include <fstream>
#include <vector>
#include <string>

using namespace std;

ifstream f("strmatch.in");
ofstream g("strmatch.out");

const long long mod1 = 666013, mod2 = 666037;
const long long b1 = 109, b2 = 101;
string a, b;
long long h1, h2, hc1, hc2, numi;
vector<long long> aux;

long long expo(long long a, long long b, long long mod)
{
    long long ans = 1;
    while(b)
        if(b % 2 == 0)
            b /= 2, a = (1LL * a * a) % mod;
        else
            b --, ans = (1LL * ans * a) % mod;

    return ans;
}

long long get_num(char x){
    return x - 'A' + 1;
}

int main()
{
    f >> a >> b;

    if(b.size() < a.size()){
        g << 0;
        return 0;
    }

    for(auto s : a)
    {
        long long x = get_num(s);
        h1 *= b1; h1 += x;
        h2 *= b2; h2 += x;

        h1 %= mod1; h2 %= mod2;
    }

    for(long long i = 0; i < a.size(); i ++)
    {
        long long x = get_num(b[i]);
        hc1 = (hc1 * b1) % mod1; hc1 += x;
        hc2 = (hc2 * b2) % mod2; hc2 += x;

        hc1 %= mod1; hc2 %= mod2;
    }

    if(hc1 == h1 && hc2 == h2)
        numi ++, aux.push_back(0);

    for(long long i = a.size(); i < b.size(); i ++)
    {
        long long x = get_num(b[i]);

        hc1 = (hc1 - get_num(b[i - a.size()]) * expo(b1, a.size() - 1, mod1) + mod1) % mod1;
        hc1 = (hc1 * b1) % mod1; hc1 += x; hc1 %= mod1;

        hc2 = (hc2 - get_num(b[i - a.size()]) * expo(b2, a.size() - 1, mod2) + mod2) % mod2;
        hc2 = (hc2 * b2) % mod2; hc2 += x; hc2 %= mod2;

        if(hc1 == h1 && hc2 == h2)
            numi ++, aux.push_back(i - a.size() + 1);

        while(aux.size() > 1000)
            aux.pop_back();
    }

    g << numi << '\n';
    for(auto x : aux)
        g << x << " ";
    return 0;
}