#include <fstream>
#include <cstring>
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");
char a[2000005],b[2000005];
int p[2000005],s[1001],l,nr;
int A;
int B;

int main()
{
    fin>>a+1;
    fin>>b+1;
    A=strlen(a+1);
    B=strlen(b+1);
    for(int i=2; i<=A; i++)
    {
        while(l!=0 && a[i]!=a[l+1])
        {
            l=p[l];
        }
        if(a[i]==a[l+1])
            l++;
        p[i]=l;
    }
    l=0;
    for(int i=1; i<=B; i++)
    {
        while(l!=0 && b[i]!=a[l+1])
        {
            l=p[l];
        }
        if(b[i]==a[l+1])
            l++;
        if(l==A)
        {
            nr++;
            if(nr<1000)

                s[nr]=i-A;
            l=p[l];

        }
    }
    fout<<nr<<"\n";
    for(int i=1;i<=min(1000,nr);i++)
    {
        fout<<s[i]<<" ";
    }
}