#include<iostream>
#include<fstream>
#include<string>
#define B1 40
#define B2 50
#define M1 4500000000
#define M2 1000000000
using namespace std;
fstream fin("strmatch.in",ios::in),fout("strmatch.out",ios::out);
string a,b;
long long p1=1,p2=1,k1,k2,k3,k4;
int poz[1111];
int main()
{
    int i,ante,j,n=0;
    fin>>a>>b;
    for(i=0;i<a.size();i++)
    {
        if(i>0) p1=(p1*B1)%M1;
        if(i>0) p2=(p2*B2)%M2;
        k1=(k1*B1+(a[i]-'A'+1))%M1;
        k2=(k2*B2+(a[i]-'A'+1))%M2;
    }
    for(i=0;i<a.size();i++)
    {
        k3=(k3*B1+(b[i]-'A'+1))%M1;
        k4=(k4*B2+(b[i]-'A'+1))%M2;
    }
    if(k1==k3 && k2==k4)
    {
        n++;
        poz[n]=0;
    }
    for(i=a.size();i<b.size();i++)
    {
        ante=i-a.size();

        k3=k3-p1*(b[ante]-'A'+1);
        k4=k4-p2*(b[ante]-'A'+1);

        k3=((k3%M1+M1)%M1)*B1+(b[i]-'A'+1);
        k4=((k4%M2+M2)%M2)*B2+(b[i]-'A'+1);

        if(k1==k3 && k2==k4)
        {
            n++;
            if(n<1000) poz[n]=ante+1;
        }
    }
    fout<<n<<"\n";
    for(i=1;i<=min(1000,n);i++) fout<<poz[i]<<" ";
}