#include <iostream>
#include <string.h>
#include <cstdio>
#include <fstream>
#define Nmax 2000000
using namespace std;
ifstream f("strmatch.in");
ofstream g("strmatch.out");
 char T[Nmax],P[Nmax];
int Urm[Nmax],m,n,v[1001];
bool ok=false;
void citire()
{
    f.getline(P,Nmax);
    f.getline(T,Nmax);
    f.close();
}
void urmatorul(char *P)
{
    int k=-1,x;
    Urm[0]=0;
    for(x=1;x<m;++x)
    {
        while(k>0 && P[k+1]!=P[x]) k=Urm[k];
        if (P[k+1]==P[x]) ++k;
        Urm[x]=k;
    }
}
int main()
{
    citire();
    n=strlen(T);
    m=strlen(P);
    int i,x=-1,j=0;
    urmatorul(P);
    for(i=0;i<n;++i)
    {
        while(x>0 && P[x+1]!=T[i]) x=Urm[x];
        if (P[x+1]==T[i]) ++x;
        if (x==m-1)
        {
            if (j<1000)
            {
                ++j;
                v[j]=i-m+1;
            }
            x=Urm[x];
        }
    }
    g<<j<<"\n";
    for(i=1;i<=j;++i) g<<v[i]<<" ";
    g.close();
    return 0;
}