#include <iostream>
#include <fstream>
#include <cstring>
#include <vector>
#define NMAX 2000001
using namespace std;
char a[NMAX],b[NMAX];
int q[NMAX],nr;
vector<int> v;
void citire()
{
    ifstream fin("strmatch.in");
    fin>>(a+1);
    fin>>(b+1);
}
void strmatch()
{
    int c=0,d=strlen(a+1);
    for(int i=2;i<=strlen(a+1);++i)
    {
        c=q[i-1];
        while(a[i]!=a[c+1] && c!=0)
            c=q[c];
        if(a[i]==a[c+1])
            q[i]=c+1;
    }
    c=0;
    for(int i=1,c=0;i<=strlen(b+1);++i)
    {
        if(a[i]==b[i])
            c++;
        else
            while(b[i]!=a[c+1] && c!=0)
                c=q[c];
        if(a[c+1]==b[i])
            c++;
        if(c==d)
        {
            v.push_back(i-c);
            c=0;
            nr++;
        }
    }
}
void afisare()
{
    ofstream fout("strmatch.out");
    fout<<nr<<"\n";
    for(int i=0;i<v.size();++i)
        fout<<v[i]<<" ";
}
int main()
{
    citire();
    strmatch();
    afisare();
    return 0;
}