#include <fstream>
#include <cstring>
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");
int i,l,P[2000010],v[1010],n,m,sol;
char a[2000010],b[2000010];
int main(){
    fin>>(a+1);
    fin>>(b+1);
    n=strlen(a+1);
    m=strlen(b+1);
    P[1]=0;
    l=0;
    for(i=2;i<=n;i++){
        while(l!=0&&a[i]!=a[l+1])
            l=P[l];
        if(a[l+1]==a[i])
            l++;
        P[i]=l;
    }
    l=0;
    for(i=1;i<=m;i++){
        while(l!=0&&b[i]!=a[l+1])
            l=P[l];
        if(b[i]==a[l+1])
            l++;
        if(l==n){
            sol++;
            if(sol<=1000)
                v[sol]=i-n;
            l=P[l];
        }
    }
    fout<<sol<<"\n";
    if(sol>1000)
        sol=1000;
    for(i=1;i<=sol;i++)
        fout<<v[i]<<" ";
    return 0;
}