#include <iostream>
#include <fstream>
#include <string.h>
#include <vector>

using namespace std;

ifstream f("strmatch.in");
ofstream g("strmatch.out");

char a[2000005], b[2000005];
int v[2000005];
vector<int> x;
int main()
{
    f >> a >> b;


    int n = strlen( a );
    int m = strlen( b );

    int i, j;
    i = 0;
    v[ i ] = 0;

    for( j = 1; j < n; j ++ )
    {
        while( i > 0 && a[i] != a[j] )
            i = v[i - 1];
        if( a[i] == a[j] )
            i ++;
        v[j] = i;
    }

    i = 0;

    for( j = 0; j < m; j ++ )
    {
        while( i > 0 && a[i] != b[j] )
            i = v[ i - 1 ];
        if( a[i] == b[j] )
            i ++ ;
        if( i == n )
        {
             x.push_back(j-i+1);
             i = v[i - 1];
        }
    }

    int ans;

    if( x.size() > 1000 )
        ans = 1000;
    else
        ans = x.size();

    g<<ans<<'\n';

    for( int i = 0; i < ans; i ++  )
        g<<x[i]<<" ";

    return 0;
}