#include <bits/stdc++.h>

//rezolvare folosind Z-Algorithm

using namespace std;

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

int z[4000010];


int main()
{
	string a,b;
	in>>a>>b;
	int n=a.size();
	string rez=a+"#"+b;
	int lung=rez.length();
	lung++;
	int st=0,dr=0;
	for(int i=1;i<lung;i++)
	{
		if(i>dr)
		{
			st=i;
			dr=i;
			while(rez[dr]==rez[dr-st] && dr<=lung)
				dr++;
			z[i]=dr-st;
			dr--;
		}
		else
		{
			if(z[i-st]+i-1<dr)
				z[i]=z[i-st];
			else
			{
				st=i;
				while(rez[dr]==rez[dr-st] && dr<=lung)
					dr++;
				z[i]=dr-st;
				dr--;
			}
		}
	}
	int ct=0;
	for(int i=1;i<lung;i++)
		if(z[i]==n)
			ct++;
	out<<ct<<"\n";
	ct=0;
	for(int i=1;i<lung;i++)
	{
		if(z[i]==n)
		{
			ct++;
			if(ct<=1000)
				out<<i-n-1<<" ";
		}
	}
	return 0;
}