#include <fstream>
#include <string>
#include <vector>
#include <list>
 
using namespace std;
 
const int MAX_NO_POS = 1000;
 
void buildSuffixTable(string & pattern, vector<int> & suffixTable) {
    int len = 0;
    int i = 1;
    while (i < pattern.size()) {
        if (pattern[i] == pattern[len]) {
            len++;
            suffixTable[i] = len;
            i++;
        } else if (len > 0) {
            len = suffixTable[len - 1];
        } else {
            suffixTable[i] = 0;
            i++;
        }
    }
}
 
void kmp(string & A, string & B, vector<int> & suffixTable, int & n, list<int> & ans) {
    if (A.size() > B.size()) {
        return;
    }
    int len = 0;
    int i = 0;
    while (i < B.size()) {
        if (B[i] == A[len]) {
            len++;
            if (len == A.size()) {
                n++;
                if (n <= MAX_NO_POS) {
                    ans.push_back(i - len + 1);
                }
                len = suffixTable[len - 1];
            }
            i++;
        } else if (len > 0) {
            len = suffixTable[len - 1];
        } else {
            len = 0;
            i++;
        }
    }
}
 
int main() {
    ifstream fin;
    ofstream fout;
    string A, B;
 
    fin.open("strmatch.in");
    fin >> A >> B;
    fin.close();
 
    vector<int> suffixTable(A.size(), 0);
    buildSuffixTable(A, suffixTable);
 
    int n = 0;
    list<int> ans;
    kmp(A, B, suffixTable, n, ans);
 
    fout.open("strmatch.out");
    fout << n << endl;
    for (auto it = ans.begin(); it != ans.end(); ++it) {
        fout << *it << " ";
    }
    fout.close();
 
    ans.clear();
 
    return 0;
}