#include <fstream>

using namespace std;

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

const int mod=30000001, sigma=62, smax=1000, mod2=30000023;

string a,b;

int v[smax+1];

int char_int(char x){
    if(x>='0'&&x<='9'){
        return x-'0';
    }else if(x>='A'&&x<='B'){
        return x-'A'+10;
    }else{
        return x-'a'+36;
    }
}

int main(){
    fin>>a>>b;
    int na=a.size(), nb=b.size();
    if(na<=nb){
        int sol=0;
        int nra=0, nrb=0, nra2=0, nrb2=0;
        for(int i=0;i<na;i++){
            nra=(nra*sigma+char_int(a[i]))%mod;
            nra2=(nra2*sigma+char_int(a[i]))%mod2;
        }
        int p=1,p2=1;
        for(int i=1;i<na;i++){
            p=(p*sigma)%mod;
            p2=(p2*sigma)%mod2;
        }
        for(int i=0;i<nb;i++){
            if(i>=na){
                nrb=(mod+nrb-(char_int(b[i-na])*p)%mod)%mod;
                nrb2=(mod2+nrb2-(char_int(b[i-na])*p2)%mod2)%mod2;
            }
            nrb=(nrb*sigma+char_int(b[i]))%mod;
            nrb2=(nrb2*sigma+char_int(b[i]))%mod2;
            if(i>=na-1&&nra==nrb&&nra2==nrb2){
                sol++;
                if(sol<=smax){
                    v[sol]=i;
                }
            }
        }
        fout<<sol<<"\n";
        for(int i=1;i<=sol&&i<=smax;i++){
            fout<<v[i]<<" ";
        }
    }else{
        fout<<0<<"\n";
    }
    return 0;
}