#include<cstdio>
#include<cstring>
#define B 67
#define P 666013
#define B2 83
#define P2 123457
using namespace std;
char a[2000002];
char b[2000002];
long pow_b;
long pow_b2;
long af[1001];
long comparare(long st  , long dr)
{
	long i,j;
	for (i=st,j=0;i<dr;i++,j++)
		if (a[i]!=b[j])
			return 0;
	return 1;
}

int main()
{
	long l,nr=0,w,hashb=0,hasha=0,la,num=0,i,hash2a=0,hash2b=0;
	
	freopen("strmatch.in","r",stdin);
	freopen("strmatch.out","w",stdout);
	
	gets(b);
	gets(a);
	l=strlen(b);
	la=strlen(a);
	for (i=0;i<l;i++)
	{
		hashb=(hashb*B+b[i])%P;
		hasha=(hasha*B+a[i])%P;
		hash2a=(hash2a*B2+a[i])%P2;
		hash2b=(hash2b*B2+b[i])%P2;
	}
	pow_b=1;
	pow_b2=1;
	for (i=1;i<=l-1;i++)
	{
		pow_b[i]=(pow_b*B)%P;
		pow_b2[i]=(pow_b2*B2)%P2;
	}
	if (hashb==hasha)
		if (hash2a==hash2b)
		{
			num++;
			af[num]=0;
		}
	for (i=1;i<la;i++)
	{
		//printf("%ld %ld\n",hasha,hashb);
		hasha=((hasha-(a[i-1]*pow_b)%P+P)%P)%P;
		hasha=hasha*B%P;
		hasha=(hasha+a[i+l-1])%P;
		hash2a=((hash2a-(a[i-1]*pow_b2)%P2+P2)%P2)%P2;
		hash2a=hash2a*B2%P2;
		hash2a=(hash2a+a[i+l-1])%P2;
		if (hashb==hasha)
			if (hash2a==hash2b)
			{
				num++;
				if (num<=1000)
				af[num]=i;
			}
	}
	printf("%ld\n",num);
	if (num>1000)
		num=1000;
	for (i=1;i<=num;i++)
		printf("%ld ",af[i]);
	if (num)
	printf("\n");
	return 0;
}