#include <fstream>
#include <cstring>
using namespace std;
char a[2000002],b[2000002];
int pi[2000002],d[2000002];
int main()
{
    int n,m,i,k,c;
    ifstream in("strmatch.in");
    ofstream out("strmatch.out");
    in>>a+1>>b+1;
    n=strlen(a+1);
    m=strlen(b+1);
    k=0;
    for(i=2;i<=n;i++)
    {
        while(a[i]!=a[k+1]&&k>0)
        {
            k=pi[k];
        }
        if(a[i]==a[k+1])
        {
            k++;
        }
        pi[i]=k;
    }
    c=0;
    k=0;
    for(i=1;i<=m;i++)
    {
        while(b[i]!=a[k+1]&&k>0)
        {
            k=pi[k];
        }
        if(b[i]==a[k+1])
        {
            k++;
        }
        d[i]=k;
        if(k==n)
            c++;
    }
    out<<c<<"\n";
    c=min(c,1000);
    for(i=1;i<=m;i++)
    {
        if(d[i]==n&&c>0)
        {
            c--;
            out<<i-n<<" ";
        }
    }
    return 0;
}