#include<bits/stdc++.h>

std::ifstream fin("strmatch.in");
std::ofstream fout("strmatch.out");

char A[2000001], B[2000001];
std::vector<int> ap;

int main(){
    fin >> A >> B;
    char* p = strstr(B, A);
    while(p){
        ap.push_back(p - B);
        p = strstr(p + 1, A);
    }
    fout << ap.size() << '\n';
    for(const int& x : ap)
        fout << x << ' ';
}