#include <bits/stdc++.h>
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");
int todigit(char c)
{
    if(islower(c)) return c-'a'+1;
    if(isupper(c)) return c-'A'+27;
}
vector<int> rabin_karp(string s, string t) {
    const int p = 53;
    const int m = 1e9 + 9;
    int S = s.size(), T = t.size();
    vector<long long> p_pow(max(S, T));
    p_pow[0] = 1;
    for (int i = 1; i < (int)p_pow.size(); i++)
        p_pow[i] = (p_pow[i-1] * p) % m;

    vector<long long> h(T + 1, 0);
    for (int i = 0; i < T; i++)
        h[i+1] = (h[i] + todigit(t[i]) * p_pow[i]) % m;
    long long h_s = 0;
    for (int i = 0; i < S; i++)
        h_s = (h_s + todigit(s[i]) * p_pow[i]) % m;

    vector<int> occurences;
    for (int i = 0; i + S - 1 < T && occurences.size()<=1000; i++) {
        long long cur_h = (h[i+S] + m - h[i]) % m;
        if (cur_h == h_s * p_pow[i] % m)
            occurences.push_back(i);
    }
    return occurences;
}

int main()
{
    string s,t;
    fin>>s>>t;
    vector<int>occurences=rabin_karp(s,t);
    fout<<occurences.size()<<"\n";
    for(auto x:occurences) fout<<x<<" ";
    return 0;
}