#include <fstream>
#include <iostream>
#include <vector>

using namespace std;

int presuf[2000005], lpat, ltxt;
vector<int> ans;

void calcPS(string pat){
    int st = 0, dr = 1;
    while(dr < lpat){
        if(pat[st] != pat[dr]) dr++;
        else{
            while(dr < lpat && pat[st] == pat[dr]){
                presuf[dr] = st + 1;
                dr++;
                st++;
            }
            st = presuf[st - 1];
        }
    }
}

void KMP(string pat, string txt){
    calcPS(pat);
    int pos = 0;
    for(int i = 0; i < ltxt; ++i){
        if(pat[pos] == txt[i]){
            if(pos == lpat - 1){
                ans.push_back(i - pos);
                pos = 0;
                i--;
            }
            else pos++;
        }
        else pos = presuf[pos - 1];
    }
}

int main()
{
    ifstream fin("strmatch.in");
    ofstream fout("strmatch.out");
    string word, phrase;
    fin >> word >> phrase;
    lpat = int(word.size());
    ltxt = int(phrase.size());
    calcPS(word);
    KMP(word, phrase);
    fout << ans.size() << "\n";
    for(int i = 0; i < min(1000, int(ans.size())); ++i)
        fout << ans[i] << " ";
    return 0;
}