#include <bits/stdc++.h> //JuniorMonster a.k.a Sho10
#define ll long long
#define all(a) (a).begin(), (a).end()
#define sz size
#define f first
#define s second
#define pb push_back
#define er erase
#define in insert
#define mp make_pair
#define pi pair
#define rc(s) return cout<<s,0
#define mod 1000000007
#define PI 3.14159265359
#define CODE_START  ios_base::sync_with_stdio();cin.tie(0);cout.tie(0);
using namespace std;
ll n,m;
string a,b;
vector<ll>v;
int main(){
    ifstream cin("strmatch.in");
    ofstream cout("strmatch.out");
cin>>a;
cin>>b;
m=a.size();
n=b.size();
for(ll i=0;i<n-m;i++){
if(b.substr(i,m)==a){
    v.pb(i);
}
}
cout<<v.size()<<endl;
ll x=1000,y=v.size();
for(ll i=0;i<min(y,x);i++)
    cout<<v[i]<<' ';
}