#include <bits/stdc++.h>
#define newline '\n'
using namespace std;
const string fname = "text";
ifstream fin(fname + ".in");
ofstream fout(fname + ".out");
///************************
class RollingHash {
public:
RollingHash(const string &text) {
this->text = text;
}
pair<int, vector<int>> getMatchingIndexes(const string &pattern, const int &maxMatches) const noexcept {
int totalMatches = 0;
vector<int> indexes;
indexes.reserve(maxMatches);
auto patternCode = getCode(pattern);
const int patternLen = pattern.size();
auto poweredBasePair = getPoweredBase(patternLen);
int poweredBase[] = {
poweredBasePair.first,
poweredBasePair.second
};
int match[] = {0, 0};
for (int i = 0; i < patternLen; i++) {
for (int j = 0; j < 2; j++) {
match[j] = (1LL * match[j] * kBase + text[i]) % kHashPrimes[j];
}
}
if (make_pair(match[0], match[1]) == patternCode) {
indexes.push_back(0);
totalMatches++;
}
for (int i = patternLen; i < (int)text.size(); i++) {
for (int j = 0; j < 2; j++) {
match[j] = (1LL * (match[j] - (1LL * poweredBase[j] * text[i - patternLen]) % kHashPrimes[j] + kHashPrimes[j])
* kBase + text[i]) % kHashPrimes[j];
}
if (make_pair(match[0], match[1]) == patternCode) {
if ((int)indexes.size() != maxMatches) {
indexes.push_back(i - patternLen + 1);
}
totalMatches++;
}
}
return make_pair(totalMatches, indexes);
}
private:
const int kHashPrimes[2] = {100003, 666013};
static constexpr int kBase = 137;
string text;
pair<int, int> getCode(const string &pattern) const noexcept {
int match[] = {0, 0};
for (int i = 0; i < (int)pattern.size(); i++) {
for (int j = 0; j < 2; j++) {
match[j] = (1LL * match[j] * kBase + pattern[i]) % kHashPrimes[j];
}
}
return make_pair(match[0], match[1]);
}
pair<int, int> getPoweredBase(const int &len) const noexcept {
int poweredBase[] = {1, 1};
for (int i = 1; i < len; i++) {
for (int j = 0; j < 2; j++) {
poweredBase[j] = (1LL * poweredBase[j] * kBase) % kHashPrimes[j];
}
}
return make_pair(poweredBase[0], poweredBase[1]);
}
};
int main() {
string text, pattern;
fin >> pattern >> text;
const auto rh = new RollingHash(text);
const auto ans = rh->getMatchingIndexes(pattern, 1E3);
fout << ans.first << endl;
for (const int &it : ans.second) {
fout << it << ' ';
}
fout.close();
return 0;
}