#include <fstream>
#include <cstring>

using namespace std;

ifstream cin ("strmatch.in");
ofstream cout ("strmatch.out");

char a[2000005], b[2000005];
int c[2000005], v[1005];
int n, m;

void prefix()
{
    int j = 0;
    for(int i = 2; i <= n; i++)
    {
        while(j != 0 && a[i] != a[j + 1])
            j = c[j];
        if (a[i] == a[j + 1])
            j++;
        c[i] = j;
    }
}
int j = 0, cnt = 0;
int main()
{
    cin.getline(a + 1, 2000005);
    cin.getline(b + 1, 2000005);
    n = strlen(a + 1);
    m = strlen(b + 1);
    prefix();
    for(int i = 1; i <= m; i++)
    {
        while(j != 0 && b[i] != a[j + 1])
            j = c[j];
        if(b[i]==a[j + 1])
        {
            j++;
            if(j == n)
            {
                if (cnt <= 1000)
                    v[cnt] = i - n;
                cnt++;
            }
        }
    }
    cout << cnt << "\n";
    for(int i = 0; i < cnt && i < 1000; i++)
        cout << v[i] <<" ";
    return 0;
}