#include<iostream>
#include<fstream>
#include<string.h>
using namespace std;

int pref[2000005];
char A[2000005],B[2000005];
int main()
{
	int i,j,p,l,k,q,nr=0,t[1024];
	ifstream f("strmatch.in");
	ofstream g("strmatch.out");
	f>>A>>B;
	
	l=strlen(A);
	k=0;
	
	
	pref[1]=0;
	for (i=2; i<=l; i++)
	{
		while (k>0 && A[k]!=A[i-1]) k=pref[k];
		if (A[k]==A[i-1]) k=k+1;
		pref[i]=k;
	}

		
	q=strlen(B);
	k=0;
	
	for (i=1; i<=q; i++)
	{
		while (k>0 && A[k]!=B[i-1]) k=pref[k];
		if (A[k]==B[i-1]) k=k+1;
		if (k==l)
		{
			nr++;
			if (nr<=1000) t[nr]=i-l;
		}
	}
	
	g<<nr<<"\n";
	
	if (nr<1000) for (i=1; i<=nr; i++) g<<t[i]<<" ";
	else for (i=1; i<=1000; i++) g<<t[i]<<" ";
	
	return 0;
}