#include <fstream>
#include <cstring>
#include <vector>

using namespace std;

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

int n,m,i,k,nr;
int pi[2000010];
char w[2000010],t[2000010];

vector<int> v;

int main()
{
    fin.get(w, 2000010);
    fin.get();
    fin.get(t, 2000010);
    n = strlen(w);
    m = strlen(t);
    for (i=n;i>=1;i--)
        w[i] = w[i-1];
    w[0] = 0;
    for (i=m;i>=1;i--)
        t[i] = t[i-1];
    t[0] = 0;
    pi[1] = 0;
    k = 0;
    for (i=2;i<=n;i++)
    {
        if (k > 0 && w[k+1] != w[i])
            k = pi[k];
        if (w[k+1] == w[i])
            k++;
        pi[i] = k;
    }

    k = 0;
    for (i=1;i<=m;i++)
    {
        if (k > 0 && w[k+1] != t[i])
            k = pi[k];
        if (w[k+1] == t[i])
            k++;
        if (k == n)
        {
            nr++;
            if (nr <= 1000)
                v.push_back(i - n);
        }
    }

    fout<<nr<<"\n";
    for (i=0;i<min(1000,nr);i++)
        fout<<v[i]<<" ";
    return 0;
}