#include <iostream>
#include <fstream>
#include <cstring>
#define maxsize 2000100

using namespace std;

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

int urm[maxsize], sol[maxsize], n, m, nr;
char T[maxsize], P[maxsize];

void Urmatorul(char *P)
{
    int k=0, x;
    urm[0]=0;
    for (x=2; x<m; ++x)
    {
        while (k>0 && P[k+1]!=P[x]) k=urm[k];
        if (P[k+1]==P[x]) k++;
        urm[x]=k;
    }
}

void KMP()
{
    int x=0;
    for (int i=1; i<n; ++i)
    {
        while (x>0 && P[x+1]!=T[i]) x=urm[x];
        if (P[x+1]==T[i]) x++;
        if (x==m)
        {
            sol[++nr]=i-m;
            x=urm[x];
        }
    }
}

int main()
{
    fin.getline(P+1,maxsize+3); m=strlen(P);
    fin.getline(T+1,maxsize+3); n=strlen(T);
    Urmatorul(P);
    KMP();
    fout<<nr<<'\n';
    for (int i=1; i<=nr; ++i)
        fout<<sol[i]<<" ";
    return 0;
}