#include <iostream>
#include <fstream>
#include <vector>
#include <string.h>
#define Nmax 2000005

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

char a[Nmax],b[Nmax];
int pre[Nmax];
int n,m;
vector<int>sir;

void citire()
{
    fin>>(a+1) >> (b+1);

    n=strlen(a+1);
    m=strlen(b+1);
}
void prefix()
{
    int k=0;
    for(int i=2;i<=n;++i)
    {
        while(k>0 && a[k+1]!=a[i])
            k=pre[k];

            if(a[k+1]==a[i])++k;
            pre[i]=k;
    }
}

void potrivire()
{
    int k=0;

    for(int i=1;i<=m;++i)
    {
        while(k>0 && a[k+1]!=b[i])
            k=pre[k];

        if(a[k+1]==b[i])
            ++k;
        if(k==n)
           sir.push_back(i-n);
    }
}
int main()
{
    citire();
    prefix();
    potrivire();

    fout<<sir.size()<<"\n";

    for(int i=0;i<min(1000,int(sir.size()));++i)
        fout<<sir[i]<<" ";
    return 0;
}