#include <fstream>
#include <cstring>
#define Nmax 2000005

using namespace std;
ifstream fin ("strmatch.in");
ofstream fout ("strmatch.out");
char x[Nmax], y[Nmax];
int n, m, i, k, pi[Nmax], nrsol, v[1005];
int main()
{
    fin.getline(x+1, Nmax);
    fin.getline(y+1, Nmax);
    x[0]=' ';
    y[0]=' ';
    n=strlen(x)-1;
    m=strlen(y)-1;
    k=0;
    pi[1]=0;
    for(i=2;i<=n;i++)
    {
        while(k>0&&x[k+1]!=x[i])
            k=pi[i];
        if(x[k+1]==x[i])
            k++;
        pi[i]=k;
    }
    k=0;
    for(i=1;i<=m;i++)
    {
        while(k>0&&x[k+1]!=y[i])
            k=pi[k];
        if(x[k+1]==y[i])
            k++;
        if(k==n)
            {
                nrsol++;
                if(nrsol<=1000)
                    v[nrsol]=i-n;
            }
    }
    fout << nrsol << '\n';
    nrsol=min(nrsol, 1000);
    for(i=1;i<=nrsol;i++)
        fout << v[i] << ' ';
    return 0;
}