#include <fstream>
#include <cstring>
#include <vector>
#define Nmax 2000005

using namespace std;
ifstream fin ("strmatch.in");
ofstream fout ("strmatch.out");
vector <int> v;
char x[Nmax], y[Nmax];
int n, m, i, k, pi[Nmax];
int main()
{
    fin.getline(x+1, Nmax);
    fin.getline(y+1, Nmax);
    x[0]=' ';
    y[0]=' ';
    n=strlen(x)-1;
    m=strlen(y)-1;
    k=0;
    pi[1]=0;
    for(i=2;i<=n;i++)
    {
        while(k>0&&x[k+1]!=x[i])
            k=pi[i];
        if(x[k+1]==x[i])
            k++;
        pi[i]=k;
    }
    k=0;
    for(i=1;i<=m;i++)
    {
        while(k>0&&x[k+1]!=y[i])
            k=pi[k];
        if(x[k+1]==y[i])
            k++;
        if(k==n)
            {
                v.push_back(i-n);
                if(v.size()==1000)
                    break;
            }
    }
    fout << v.size() << '\n';
    for(i=0;i<v.size();i++)
        fout << v[i] << ' ';
    return 0;
}