#include <iostream>
#include <fstream>
#include <cstring>
using namespace std;

char a[2000001],b[2000001];
int po,n,m,pi[2000000],sol[2000001];

void citire()
{
    ifstream f("strmatch.in");
    f>>a;
    f>>b;
    n=strlen(a);
    m=strlen(b);
    f.close();
}

void Prefix()
{
    int k;
    pi[0]=-1;
    k=-1;
    for(int q=1;q<n;q++)
    {
        while(k>-1 && a[k+1]!=a[q])
            k=pi[k];
        if(a[k+1]==a[q])
            k++;
        pi[q]=k;
    }
}

void KMP()
{
    int q;
    Prefix();
    q=-1;
    for(int i=0;i<m;i++)
    {
        while(q>-1 && a[q+1]!=b[i])
            q=pi[q];
        if(a[q+1]==b[i])
            q++;
        if(q==n-1)
          {
              q=pi[n];
              po++;
              sol[po]=i-n+1;
          }
    }
}

void afisare()
{
    ofstream g("strmatch.out");
    g<<po<<"\n";
    for(int i=1;i<=min(po,1000);i++)
        g<<sol[i]<<" ";
    g<<"\n";
    g.close();
}

int main()
{
    citire();
    KMP();
    afisare();
    return 0;
}