#include <fstream>
#include <string>
#include <vector>
#define Nmax 2000001
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");
string s,t;
int stare[Nmax],nr;
vector <int> v;
int main()
{
    fin>>s>>t;
    int st=0,i,x=s.size();
    for (i=2;i<=x;i++)
    {
        while (st>0 && s[st]!=s[i-1])
            st=stare[st];
        if (s[st]==s[i-1]){
            st++;
        }
        stare[i]=st;
    }
    int x1=t.size();
    st=0;
    for (i=2;i<=x1;i++){
        while (st>0 && s[st]!=t[i-1])
            st=stare[st];
        if (s[st]==t[i-1]){
            st++;
        }
        if (st==x)
        {
            nr++;
            v.push_back(i-st);
        }
    }
    fout<<nr<<"\n";
    for (auto i:v)
        fout<<i<<" ";
    return 0;
}