#include <fstream>
#include <string>
#include <iostream>
  
using namespace std;
  
ifstream fi("strmatch.in");
ofstream fo("strmatch.out");
  
string a,b;
int p2,h2,k2,p1,h1,k1,n,m,i,v[3000000],vn;
const int mod1=100021,mod2=100007,p=73;
  
  
int main(){
      
    fi >> a >> b; n = a.size(); m = b.size();
    if (n>m) { fo << "0"; return 0; }
     
    p1=1; p2=1;
    for (i=0; i<n; i++){
        k1 = (k1*p+a[i]) % mod1; k2 = (k2*p+a[i]) % mod2;
        h1 = (h1*p+b[i]) % mod1; h2 = (h2*p+b[i]) % mod2; 
        if (i) {p1 = (p1*p) % mod1; p2 = (p2*p)%mod2;}
    }
 
    if ((k2==h2)&&(k1==h1)) vn++;
      
    for (i=n; i<m; i++){
        h1 = ((h1-(b[i-n]*p1)%mod1+mod1)*p+b[i])%mod1;
        h2 = ((h2-(b[i-n]*p2)%mod2+mod2)*p+b[i])%mod2;
        if ((k2==h2)&&(k1==h1)) v[vn++] = i-n+1;
    }
      
    fo << vn << "\n";
    for (i=0; i<vn && i<1000; i++) fo << v[i] << " ";
      
    return 0;
}