#include<vector>
#include<fstream>
#define har 967765
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");
char c,a[2000002],b[2000002];
int m,n, sol ,ok, p[2000002],i;

int main()
{
    while(fin.get(c)&&c!='\n')
    {
        a[++m]=c;
    }
    while(fin.get(c))
    {
        b[++n]=c;
    }
    n--;
    for(i=1;i<=n;i++)
    {
        while(ok!=0&&b[i]!=a[ok+1])
            ok=p[ok];
        if(b[i]==a[ok+1])
            ok++;
        p[i]=ok;
        if(ok==m)
            sol++;
    }
    fout<<sol<<"\n";
    for(i=1;i<=n;i++)
        if(p[i]==m)
            fout<<i-m<<" ";
    fin.close();
    fout.close();
    return 0;
}