#include <bits/stdc++.h>

using namespace std;

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


int lps[2000005];
char s1[2000005], s2[2000005];

int ans1 = 0;
vector < int > ans2;

void make_lps(){
	int j = 0;
	for(int i = 1; s1[i] != '\0'; ++i){
		if(s1[i] == s1[j]){
			lps[i] = ++j;
		}else if(j != 0){
			j = lps[j-1];
			i--;
		}
	}
}

void solve(){
	int j = 0;
	for(int i = 0; s2[i] != '\0'; ++i){
		if(s1[j] == s2[i]){
			j++;
			if(s1[j] == '\0'){
				ans1++;
				if(ans1 <= 1000)ans2.push_back(i-j+1);
				j = lps[j-1];
			}
		}else if(j != 0){
			j = lps[j-1];
			i--;
		}
	}
}

int main(){
	// ios_base::sync_with_stdio(false);
	f >> s1 >> s2;
	make_lps();
	solve();

	g << ans1 << '\n';
	for(int a=0;a<ans2.size();a++) {
        g << ans2[a] << " ";
	}
	return 0;
}