#include <fstream>
#include <string>
#include <vector>
using namespace std;

#define base 1010012383
#define mod 1010012359

string a,b;
vector<int>arr;
long long ha,hb,p,c,p1;

int main()
{
    ifstream be("strmatch.in");
    ofstream ki("strmatch.out");
    be>>a>>b;
    p=1;
    if(a.size()>b.size())
    {
        ki<<0;
        return 0;
    }
    for(int i=0;i<a.size();i++)
    {
        ha=(ha*base+a[i])%mod;
        hb=(hb*base+b[i])%mod;
        p=(p*base)%mod;
    }

    if(ha==hb)
    {
        c++;
        arr.push_back(0);
    }

    for(int i=1;i<=b.size()-a.size();i++)
    {
        hb=(hb*base+b[a.size()+i-1])%mod;
        p1=(p*b[i-1])%mod;
        hb=(hb-p1+mod)%mod;
        if(hb==ha)
        {
            c++;
            if(arr.size()<1000)
                arr.push_back(i);
        }

    }
    ki<<c<<endl;
    for(int i=0;i<arr.size();i++)ki<<arr[i]<<" ";
    return 0;
}