#include <fstream>
#include <iostream>
#include <string>
#include <vector>
#include <iterator>
#include <algorithm>

#define MAXN 2000005

using namespace std;

int SkipTable[MAXN];

void BuildSkipTable(const string& sPattern)
{
    int iCandidateIndex = 0;
    int iPatternIndex = 2;
    int iPatternLength = sPattern.length();
    
    while (iPatternIndex < iPatternLength)
    {
        while (sPattern[iPatternIndex] != sPattern[iCandidateIndex] && iCandidateIndex > 0)
        {
            iCandidateIndex = SkipTable[iCandidateIndex];
        }
        
        if (sPattern[iPatternIndex] == sPattern[iCandidateIndex])
        {
            ++iCandidateIndex;
            SkipTable[iPatternIndex] = iCandidateIndex;
        }
        
        ++iPatternIndex;
    }
}

template <class OutputIterator>
int KnuthMorrisPratt(const string& sPattern, const string& sText, OutputIterator itOut)
{
    int iTextIndex = 0;
    int iPatternIndex = 0;
    int iTextLength = sText.length();
    int iPatternLength = sPattern.length();
    int iTotalMatched = 0;
    
    while (iTextIndex < iTextLength)
    {
        while (sText[iTextIndex] != sPattern[iPatternIndex] && iPatternIndex > 0)
        {
            iPatternIndex = SkipTable[iPatternIndex];
        }
        
        if (sText[iTextIndex] == sPattern[iPatternIndex])
        {
            ++iPatternIndex;

            if (iPatternIndex == iPatternLength)
            {
                iPatternIndex = SkipTable[iPatternLength-1];
                ++iTotalMatched;
                *itOut = iTextIndex - iPatternLength + 1;
                ++itOut;
            }
            else
            {
                ++iTextIndex;
            }
        }
        else
        {
            ++iTextIndex;
        }
    }
    
    return iTotalMatched;
}

int main()
{
    string sText, sPattern;
    vector<int> vMatched;
    fstream fin("strmatch.in", fstream::in);
    fstream fout("strmatch.out", fstream::out);
    
    fin >> sPattern >> sText ;
    //cout << sText << endl << sPattern << endl;
    
    BuildSkipTable(sPattern);
    
    int iTotalMatched = KnuthMorrisPratt(sPattern, sText, back_inserter(vMatched));
    
    fout << iTotalMatched << "\n";
    ostream_iterator<int> itOut(fout, " ");
    copy(vMatched.begin(), vMatched.end(), itOut);
    fout << "\n";
    
    fin.close();
    fout.close();
    return 0;
}