#include <bits/stdc++.h>
#define nmax 2000000
using namespace std;
string prob="strmatch";
ifstream in(prob+".in");
ofstream out(prob+".out");
int z[nmax*2];
int apar[1005];
int si=0;
string s,tmp;
int n,m;
int main(){
    in>>s>>tmp;
    m=s.size();
    s+="$"+tmp;
    n=s.size();
    int x,y;
    x=y=0;
    for(int i=1;i<n;i++){
        z[i]=max(0,min(z[i-x],y-i+1));
        while(i+z[i]<n&&s[z[i]]==s[i+z[i]]){
            x=i;
            y=i+z[i];
            z[i]++;
        }
        if(i>m){
            if(z[i]==m){
                if(si<1000)apar[si]=i-m-1;
                si++;
            }
        }
    }
    out<<si<<'\n';
    for(int i=0;apar[i];i++)out<<apar[i]<<' ';
}