#include <iostream>
#include <fstream>
#include <vector>
#define NMAX 2000000

using namespace std;

ifstream f("strmatch.in");
ofstream g("strmatch.out");

int phi[2*NMAX+10], ans;
vector <int> sol;
string s1, s2, s;

int main()
{
    f >> s1 >> s2;
    s = s1 + '%' + s2;
    int n1 = s1.size(), n = s.size(), j = 0, i = 1;
    while(i < n)
        {   if(s[j] == s[i]) phi[i] = j + 1, i++, j++;
            else
                {   if(j > 0) j = phi[j-1];
                    else i++;
                }
        }
    for(int i=0; i<n; i++)
        if(phi[i] == n1)
            {   ans++;
                if(ans <= 1000) sol.push_back(i - 2 * n1);
            }
    g << ans << '\n';
    for(int i=0; i<sol.size(); i++) g << sol[i] << ' ';
    g << '\n';
    return 0;
}