#include <cstdio>
#include <cstring>

#define file_in "strmatch.in"
#define file_out "strmatch.out"

#define Nmax 2410000

int i,k,n,m,pi[Nmax];
char a[Nmax];
char b[Nmax];
int nr,sol[Nmax];


void prefix()
{
	k=0;
	pi[1]=0;
	
	for (i=2;i<=n;++i)
	{
		while(a[k+1]!=a[i] && k>0) k=pi[k];
		if (a[k+1]==a[i]) k++;
		pi[i]=k;
	}
}

void kmp()
{
	k=0;
	nr=0;
	for (i=1;i<=m;++i)
	{
		while(a[k+1]!=b[i] && k>0) k=pi[k];
		if (a[k+1]==b[i]) k++;
		if (k==n)
		{
			sol[++nr]=i-n;
		}
	}
}
	


int main()
{
	freopen(file_in,"r",stdin);
	freopen(file_out,"w",stdout);
	
	scanf("%s\n", a+1);
	n=strlen(a+1);
	scanf("%s\n", b+1);
	m=strlen(b+1);
	
	prefix();
	kmp();
	
	printf("%d\n", nr);
	
	for (i=1;i<=nr && i<=1000;++i)
		 printf("%d ", sol[i]);
	
	fclose(stdin);
	fclose(stdout);
	
	
	return 0;
	
}