#include <iostream>
#include <fstream>
#include <vector>
#include <cstring>
using namespace std;
#define lenmax 2000005
ifstream f("strmatch.in");
ofstream g("strmatch.out");

char a[lenmax],b[lenmax];
int len1,len2,aux[lenmax],pozcnt;


vector<int>poz;

void read()
{
    f.getline(a,lenmax);
    len1=strlen(a);
    f.getline(b,lenmax);
    len2=strlen(b);
}

void preKMP()
{
    int i,j=0;
    for (i=1; i<len1; ++i)
    {
        while (j>0&&a[i]!=a[j])
        {
            j=aux[j-1];
        }
        if (a[i]==a[j])
            ++j;
        aux[i]=j;
    }
}

void KMP()
{
    int i,j=0;
    for (int i=0; i<len2; ++i)
    {
        while (j>0&&b[i]!=a[j])
        {
            j=aux[j-1];
        }
        if (b[i]==a[j])
            ++j;
        if (j==len1)
        {
            if (poz.size()==1000);
            else
                poz.push_back(i-len1+1);
            ++pozcnt;
        }
    }
}

void afis()
{
    g<<pozcnt<<'\n';
    for (auto w:poz)
        g<<w<<' ';
}


int main()
{
    read();
    preKMP();
    KMP();
    afis();
    return 0;
}