#include <iostream>
#include <fstream>
#include <algorithm>
#include <vector>
#include <unordered_map>
#include <cstring>

///#include <tryhardmode>
///#include <GODMODE::ON>

using namespace std;

//#define cin fin
//#define cout fout

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

const int BASE=27;
const int MOD=1e5+7;

vector<int>v;
string a;
string b;

int lgput(int a,int b)
{
    int total;
    if(b==0)
        return 1;
    else
    {
        if(b%2==0)
        {
            total=lgput(a,b/2)%MOD;
            total=1LL*total*total%MOD;
            return total;
        }
        else
        {
            total=lgput(a,b/2)%MOD;
            total=1LL*total*total%MOD;
            return 1LL*total*a%MOD;
        }
    }
}

void rabin(int n,int m)
{
    int i,j,hasha=0,hashb=0,p;
	for(i=0;i<n;i++)
	{
		hasha=(hasha*BASE+(a[i]-'0'))%MOD;
		hashb=(hashb*BASE+(b[i]-'0'))%MOD;
	}
	if(hasha==hashb)
		v.push_back(0);
    p=lgput(BASE,n-1);
	for(i=n;i<m;i++)
	{
		hashb=((hashb-((b[i-n]-'0')*p)%MOD+MOD)*BASE+(b[i]-'0'))%MOD;
		if(hashb==hasha)
			v.push_back(i-n+1);
	}
}

int main()
{
    int i,j,n,m,debuff=0;
    cin>>a>>b;
    n=a.size();
    m=b.size();
    rabin(n,m);
    cout<<v.size()<<"\n";
    for(auto i:v)
    {
        debuff++;
        cout<<i<<" ";
        if(debuff==1000)
            exit(0);
    }
    return 0;
}