#include <fstream>
#include <cstring>
using namespace std;

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

int n,m,i,l,p[2000010],s[1001],cnt,sol;
char a[2000010],b[2000010];

int main(){
    fin>>a+1>>b+1;
    n=strlen(a+1);
    m=strlen(b+1);

    l=0;
    for(i=2;i<=n;i++){
        while(l!=0 && a[i]!=a[l+1])
            l=p[l];
        if(a[i]==a[l+1])
            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(cnt<1000)
            s[++cnt]=i-n;
        }
    }

    fout<<sol<<"\n";
    for(i=1;i<=cnt;i++)
        fout<<s[i]<<" ";

    return 0;
}