#include<fstream>
using namespace std;
ifstream in ("strmatch.in");
ofstream out ("strmatch.out");
int i,j,pi[4000005], potriviri[10005],occ,len;
string s,s2;
int main (void) {
    in >> s;
    in >> s2;
    len = s.size();
    s = s + '#' + s2;

    pi[0] = -1;
    j = -1;
    for (int i = 0; i < s.size(); i ++) {
        while (j >= 0 && s[i] != s[j]) {
            j = pi[j];
        }
        j ++;
        pi[i+1] = j;
        if (j == len) {
            occ ++;
            if (occ <= 1000)
                potriviri[occ] = i-len*2;
            j = pi[j];
        }
    }

    out << occ <<"\n";
    for (int i = 1; i <= min(occ,1000); i ++) {
        out << potriviri[i] <<" ";
    }

    return 0;
}