#include <iostream>
#include <fstream>
#include <vector>
#include <cstring>

using namespace std;
ifstream in("strmatch.in");
ofstream out("strmatch.out");

#define pb push_back
#define ui unsigned int
const ui NMax = 2e6 + 5;
const ui base = 73;

int N,M;
char patt[NMax],str[NMax];
vector<int> sol;

int main() {
    in>>(patt+1)>>(str+1);
    N = strlen(patt+1);
    M = strlen(str+1);

    ui pattHash,strHash,pw;
    pattHash = strHash = 0;
    pw = 1;
    for (int i=1;i<=N;++i) {
        pattHash = pattHash * base + patt[i] * base;

        strHash = strHash * base + str[i] * base;

        pw *= base;
    }

    if (pattHash == strHash) {
        sol.pb(0);
    }

    for (int i=N+1;i<=M;++i) {
        strHash = (strHash - str[i-N] * pw) * base + str[i] * base;

        if (pattHash == strHash) {
            sol.pb(i-N);
        }
    }

    out<<sol.size()<<'\n';
    int lim = (1000 < sol.size()) ? 1000 : sol.size();
    for (int k=0;k < lim;++k) {
        out<<sol[k]<<' ';
    }

    in.close();out.close();
    return 0;
}