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

using namespace std;

#define NM 2000005
#define PB push_back

int p[NM], N, M;
string S, T;
vector <int> sol;


void compute_prefix()
{
	p[0] = -1;
	p[1] = 0;
	for (int i = 2; i <= N; ++i)
	{
		int x = i-1;
		while (x >= 1 && S[p[x]] != S[i-1]) x = p[x];	
		p[i] = p[x] + 1;			
	}
}

void apply_kmp()
{
	int x = 0, s = 0;
	while (s < M)
	{
		if (T[s + x] == S[x]) 
		{
			x++;
			if (x == N) 
			{
				//cout << s << " ";
				sol.PB (s);				
				s = s + x - p[x];
				x = p[x];
			}
			continue;
		}
		else 
		{
			while (x >= 1 && T[s + x] != S[x]) x = p[x];
			s = s + x - p[x];
		}
	}
}

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

	f >> S >> T;
	N = S.length();
	M = T.length();
	
	compute_prefix();
	//for (int i = 0; i <= N; ++i) cout << i << " -> " << p[i] << endl;
	apply_kmp();	
	
	g << sol.size() << '\n';
	for (unsigned int i = 0; i < sol.size(); ++ i) g << sol[i] << " ";

	return 0;
}