#include <fstream>
#include <cstring>

using namespace std;

ifstream fin("strmatch.in");
ofstream fout("strmatch.out");

char A[2000010],B[2000010];
int pi[2000010],i,j,a,b,ans[1010],k;

int main()
{
    fin.get( A + 1 , 2000010 ); fin.get();
    fin.get( B + 1 , 2000010 ); fin.get();
    A[ 0 ] = ' ';
    B[ 0 ] = ' ';
    a = strlen( A );
    b = strlen( B );

    for( i = 2 ; i <= a ; i++ )
    {
        while( k > 0 && A[ k + 1 ] != A[ i ] )
            k = pi[ k ];

        if( A[ k + 1 ] == A[ i ] )
            k = k + 1;

        pi[ i ] = k;
    }

    k = 0;
    for( i = 1 ; i <= b ; i++ )
    {
        while( k > 0 && A[ k + 1 ] != B[ i ] )
            k = pi[ k ];

        if( A[ k + 1 ] == B[ i ] )
            k = k + 1;

        if( k == a - 1 )
        {
            if( ans[ 0 ] <= 1000 )
                ans[ ++ans[ 0 ] ] = i - a + 1;
            else
                ans[ 0 ]++;
        }
    }

    fout<<ans[ 0 ]<<'\n';
    for( i = 1 ; i <= min( ans[ 0 ] , 1000 ) ; i++ )
        fout<<ans[ i ]<<' ';

return 0;
}