#include <iostream>
#include <fstream>
#include <cstring>
#include <vector>

using namespace std;

string filename = "strmatch";

ifstream fin(filename + ".in");
ofstream fout(filename + ".out");

const int NMAX = 2 * 1e6;
const int MOD = 1e9 + 7;

string a,b;
int put[NMAX + 5];///31
int ha;///doar pentru b fac
int hb[NMAX + 5];

void compute_hash()
{
    put[0] = 1;
    for(int i=1;i<=NMAX;i++)
        put[i] = 1LL * put[i-1] * 307 % MOD;

    for(int i=0;i<a.size();i++)
        ha = (ha + (1LL * (a[i] - 'A' + 302) * put[i]))%MOD;

    for(int i=0;i<b.size();i++)
        hb[i] = ((i>0 ? hb[i-1] : 0) + (1LL * (b[i] - 'A' + 302) * put[i]))%MOD;

    ha = (1LL * ha * put[NMAX])%MOD;
}

///aduc startul la 31^NMAX

int queryb(int st,int dr)
{
    return 1LL * (1LL * (hb[dr] - hb[st-1] + MOD) % MOD * 1LL * put[NMAX - st]) % MOD;
}


signed main()
{
    fin>>a>>b;
    compute_hash();
    int n = a.size(), m = b.size();
    vector<int> ans;
    int N = 0;
    for(int i=1;i<=m-n+1;i++)
    {
        if(ha == queryb(i, i+n-1))
        {
            N++;
            if(N<=1000)
                ans.push_back(i-1);
        }
    }
    fout<<N<<'\n';
    for(auto it : ans)
        fout<<it<<' ';
    return 0;
}