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

using namespace std;

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

int main(){
	string W, S;
	vector<int> T;
	getline(in, W);
	getline(in, S);
	T.resize(W.length());
	{   //kmp table
		int pos = 2, cnd = 0;
		T[0] = -1;
		T[1] = 0;
		while (pos < (int)W.length()){
			if (W[pos - 1] == W[cnd]){
				++cnd;
				T[pos] = cnd;
				++pos;
			}
			else if (cnd > 0){
				cnd = T[cnd];
			}
			else{
				T[pos] = 0;
				++pos;
			}
		}
	}
	vector<int> matches;
	int m = 0, i = 0;
	while (m + i < (int)S.length()){
		if (W[i] == S[m + i]){
			if (i == (int)W.length() - 1){
				matches.push_back(m);
				if (matches.size() == 1000){
					break;
				}
				goto fallback;
			}
			++i;
			continue;
		}
	fallback:
		if (T[i] > -1){
			m = m + i - T[i];
			i = T[i];
		}
		else{
			i = 0;
			++m;
		}

	}
	out << matches.size() << "\n";
	for (auto x : matches){
		out << x << " ";
	}

	return 0;
}