#include <bits/stdc++.h>
#include <fstream>
using namespace std;
ifstream in("strmatch.in");
ofstream out("strmatch.out");

long long v1,v2,na,nb,h1,h2,p1,p2,m1,m2,i,sol[10005],nr,k;
char a[2000050],b[2000050];
int main()
{
    in.getline(a,2000050);
    in.getline(b,2000050);

    na=strlen(a),nb=strlen(b);
    p1=p2=1;
    v1=v2=0;
    h1=h2=0;
    m1=666013;
    m2=10003;
    for(i=0;i<na;i++)
    {
        h1=(h1*101+a[i])%m1;
        h2=(h2*101+a[i])%m2;
        if(i!=0)  p1=(p1*101)%m1,
                  p2=(p2*101)%m2;
        v1=(v1*101+b[i])%m1;
        v2=(v2*101+b[i])%m2;
    }
    for(i=na;i<nb;++i){
        v1=((v1-(b[i-na]*p1)%m1+m1)*101+b[i])%m1;
        v2=((v2-(b[i-na]*p2)%m2+m2)*101+b[i])%m2;
        if(v1==h1 && v2==h2) {nr++; if(k<=999)sol[++k]=i-na+1;}
    }
    out<<nr<<endl;
    for(i=1;i<=k;i++)
    {
        out<<sol[i]<<' ';
    }
    return 0;
}