#include <iostream>
#include <fstream>
#include <string>
#include <vector>

using namespace std;

ifstream fin("strmatch.in");
ofstream fout("strmatch.out");

string a, b;
int pr[2000041];
void precalc(){
	int q = 0;
	for(int i = 1; i < a.size(); ++i){
		while(a[i] != a[q] && q>0){
			q = pr[q];
		}
		if(a[i] == a[q]){
			q++;
		}
		pr[i] = q;
	}
}

int cer=0;
vector<int> sol;
void postcalc(){
	int i = 0;
	for(int j = 0; j < b.size(); ++j){
		while(a[i] != b[j] && i>0){
			i = pr[i-1];
		}
		if(a[i] == b[j]){
			i++;
		}
		if(i == a.size()){
			cer++;
			if(sol.size() < 1000){
				sol.push_back(j-a.size()+1);
			}
			i = pr[i-1];
		}
	}
}

int main(){
	fin >> a >> b;
	precalc();
	postcalc();
	fout << cer << "\n";
	for(auto a : sol){
		fout << a << " ";
	}
	return 0;
}