#include<cstdio>
#include<cstring>
char a[2000005],b[2000005];
int r[1005],nr;
int lg=0;
struct hash
{
	long long v;
	long long bston;
	static const long long bs=43;//maximum possible digit is 'Z'-'0' == 42
	static const long long md=666013;//Infoarena-approved Big Prime
	hash (char * s){
		v=0;
		bston=1;
		if(!lg)
			lg=strlen (s);
		for(int i=0;i<lg;i++)
			(*this)+=s[i];
	}
	bool operator==(hash h)
	{
		return v==h.v;
	}
	inline void operator-=(int x)
	{
		x-='0';

		while(bston%bs)
			bston+=md;
		bston/=bs;

		v-=x*bston;
		while(v<0)
			v+=md;
		v%=md;
	}
	inline void operator+=(int x)
	{
		x-='0';
		bston=(bston*bs)%md;
		v=(v*bs+x)%md;
	}
};

void rabinkarp()
{
	hash ha (a),hb (b);
	for(int i=0;i<strlen (b)-strlen (a)+1;i++){
		if(ha==hb)
			if((strncmp (a,b+i,strlen (a))==0)){
				if(nr<1000)
					r[nr]=i;
				nr++;
			}
		hb-=b[i];
		hb+=b[i+strlen (a)];
	}
}
int main()
{
	freopen ("strmatch.in","r",stdin);
	freopen ("strmatch.out","w",stdout);
	gets (a);
	gets (b);
	rabinkarp();
	printf ("%d\n",nr);
	for(int i=0;i<nr&&i<1000;i++)
		printf ("%d ",r[i]);
	return 0;
}