#include<cstdio>
#include<vector>
#include<list>
using namespace std;

list <int> :: iterator it, it2; 
list <int> m;
vector <int> sol;
vector <char> a, b;
void Read(vector <char> &v){
	char c;
	do {scanf("%c", &c), v.push_back(c);}
			while (c != '\n');
	v.pop_back();
}

int main(){
	freopen ("strmatch.in", "r", stdin), freopen("strmatch.out", "w", stdout);
	int i, j;
	Read(a);	Read(b);
	
	for (j = 0; j < (int)b.size(); j++){
		for (it = it2 = m.begin(); it != m.end(); it = it2){
			++it2;
			if (a[*it] == b[j]){
				if (++ (*it) == (int)a.size()) {
					sol.push_back(j - a.size() + 1);
					m.erase(it);
				}
			}
			else m.erase(it);
		}
		if (b[j] == a[0]) m.push_back(1);
		}
		
	printf ("%d\n", sol.size());
	for (i = 0; i < (int)sol.size() && i < 1000; i++) 
		printf("%d ", sol[i]);
	return 0;
}