#include <bits/stdc++.h>
#define MAXIM 2000000
using namespace std;
char s[MAXIM],t[MAXIM];
int hash1(string s){
    unsigned long long x = 0;
    for(string::iterator i = s.begin();i!=s.end();++i)
        x+= (int)*i % 101 ;
    return x%100007;
}

int n;
vector<int> p;
void Print(vector<int> v){
    for(vector<int>::iterator i= v.begin();i!=v.end();++i)
        cout<< *i << ' ';
    cout<<"\n";
}
int main()
{
    freopen("strmatch.in", "r", stdin);
    freopen("strmatch.out", "w", stdout);
    cin>>s>>t;
    string s1,t1;
    int LS = strlen(s),LT=strlen(t);
    for(int i=0;i<LS;++i){
        s1.push_back(s[i]);
        t1.push_back(t[i]);
    }
    if(s1==t1){
        ++n;
        p.push_back(0);
    }
    int hs1 = hash1(s1);
    int ht1 = hash1(t1);
    for(int i=1;i<LT;++i){
        ht1 = ht1 + t[i+LS-1] - t[i-1];
        t1.erase(t1.begin());
        t1.push_back(t[i+LS-1]);
        if(ht1==hs1){
            if(t1==s1){
                ++n;
                if(n<1000)
                    p.push_back(i);
            }
        }
    }
    cout<< n << '\n';
    Print(p);
    return 0;
}