/*  p[] - pattern, t[] - text
	numerotam de la 1. k reprezinta lungimea prefixului-sufix maxim la pasul curent 
	si e salvat in vectorul pi[]. Exemplu:
											ababbababaac
											001201234310            */

#include<fstream>
using namespace std;


char p[2000002],t[2000002];
long pi[2000002],m,n,nrap,aparitii[1001];
void citire()
{
	freopen("strmatch.in","r",stdin);
	freopen("strmatch.out","w",stdout);
	scanf("%s%s",p+1,t+1);	
	m=strlen(p+1);
	n=strlen(t+1);
	//p[0]=t[0]='g';
	//printf("%s\n%s",p,t);
	nrap=0;
}

void calc_prefix()
{
	int k=0;
	pi[1]=0;
	
	for(int i=2;i<=m;i++)
	{
		while((k>0)&&(p[k+1]!=p[i]))
			k=pi[k];
		if(p[k+1]==p[i])
			k++;
		pi[i]=k;
	}
}

void kmp()
{
	int k=0;
	
	for(int i=1;i<=n;i++)
	{
		while((k>0)&&(p[k+1]!=t[i]))
			k=pi[k];
		if(p[k+1]==t[i])
			k++;
		if(k==m)
		{
			nrap++;
			if(nrap<1000) 
				aparitii[nrap]=i-m;
		}
	}

}

void afisare()
{
	printf("%ld\n",nrap);
	for(int i=1;i<=nrap;i++)
		printf("%ld ",aparitii[i]);
}
int main()
{
	citire();
	calc_prefix();
	kmp();
	afisare();
	return 0;
}