#include <fstream>
#include <cstring>
using namespace std;
ifstream f ("strmatch.in");
ofstream g ("strmatch.out");
const int NMAX=2000005;
int n, m, nr, prefix[NMAX], sol[1024];
char a[NMAX], b[NMAX];
int minim(int a, int b)
{
	if(a > b)
		return b;
	return a;
}
void make_prefix()
{
    int k=0;
    for(int i = 2;i <= m; i++)
    {
        while( k && a[k + 1] != a[i]) 
			k = prefix[k];
        if(a[k + 1] == a[i]) 
			k++;
        prefix[i] = k;
    }
}
int main()
{
    int k = 0;
    f.getline(a + 1, NMAX);
    f.getline(b + 1, NMAX);
    m = strlen(a + 1);
    n = strlen(b + 1);
    make_prefix();
    for(int i = 1; i <= n; i++)
    {
        while(k && a[k + 1] != b[i]) 
			k = prefix[k];
        if(a[k + 1] == b[i]) 
			k++;
        if(k == m)
        {
            k = prefix[m];
            nr++;
            if(nr <= 1000) 
				sol[nr] = i - m;
        }
    }
    g << nr << '\n';
    for(int i = 1; i <= minim(nr, 1000); i++) 
		g << sol[i] << ' ';
}