#include <fstream>
#include <string.h>
#include <vector>
#define ios ios_base::sync_with_stdio(false);

using namespace std;

int i,j,rez;
char a[2000005],b[2000005];
vector<int> urm;
vector<int> poz;

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

void citire(){
    fin>>a>>b;
    urm.assign (strlen(a),0);
    poz.assign (strlen(a),0);
}

void prefix(){
    int k=0;
    for (i=1; i<strlen(a); i++){
        while (k>0 && a[k]!=a[i]) k=urm[k];
        if (a[k]==a[i]) k++;
        urm[i]=k;
    }
};

void rezolvare(){
    prefix();
    j=0;
    for (i=0;i<strlen(b); i++){
        while (j>0 && a[j]!=b[i]) j=urm[j];
        if (a[j]==b[i]) j++;
        if (j==strlen(a)){
            if (rez<1000) poz[++rez]=i-strlen(a)+1;
            j=urm[j-1];
        }
    }
}

void scriere(){
    fout<<rez<<'\n';
    for (i=1;i<=rez;i++)
        fout<<poz[i]<<" ";
}

int main()
{
    ios;
    fin.tie(0);
    fout.tie(0);
    citire();
    prefix();
    rezolvare();
    scriere();
    return 0;
}