#include <bits/stdc++.h>
using namespace std;
ifstream fin ( "strmatch.in" );
ofstream fout ( "strmatch.out" );

void read ( );
void preprocess ( );
void solve ( );
void afis ( );

string pat;
string cuvant;

vector < int > v;
vector < int > sol;

int k;

int main ( )
{
    read ( );

    preprocess ( );

    solve ( );

    afis ( );
}

void afis ( )
{
    fout << k << '\n';

    for ( int i = 0; i < k; i++ )
        fout << sol[i] << ' ';

    exit ( 0 );
}

void solve ( )
{
    int lng = cuvant.size();
    int lg = pat.size();

    int j = 0;
    int i = 0;

    while ( i < lng )
    {
        if ( pat[j] == cuvant[i] )
        {
            i++;
            j++;
        }

        if ( j == lg )
        {
            k++;
            sol.push_back ( i - j );
            j = v[lg-1];

            if ( k == 1000 )
                exit ( 0 );
        }

        else if ( i < lng && pat[j] != cuvant[i] )
        {
            if ( j )
                j = v[j-1];
            else
                i++;
        }
    }
}

void preprocess ( )
{
    int lng = pat.size();
    v.reserve ( lng+1 );

    v[0] = 0;

    int j = 0;

    for ( int i = 1; i < lng; i++ )
    {
        if ( pat[j] == pat[i] )
        {
            v[i] = j + 1;
            j++;
        }

        else
        {
            while ( j && pat[j] != pat[i] )
                j = v[j-1];

            if ( pat[j] == pat[i] )
            {
                v[i] = j + 1 ;
                j++;
            }

            else
                v[i] = 0;
        }
    }
}

void read ( )
{
    getline ( fin, pat );
    getline ( fin, cuvant );
}