#include <cstdio>
#include <string.h>

#define P 173
#define M 666013

FILE *f,*s;

int NA,NB;

int i,j,k,l,m,n;

char A[2000005],B[2000005];

int v1[2000005];

int hasha,hashb;

int Compara(int a, int b)
{
	for(int j=a;j<=a+b-1;j++)
		if((int)A[j-a]!=(int)B[j]) return 0;
	
	return 1;
}

int main()
{
	f=fopen("strmatch.in","r");
	s=fopen("strmatch.out","w");
	
	fscanf(f,"%s\n%s",A,B);
	
	NA=strlen(A);
	NB=strlen(B);
	
	if(NA>NB)
	{
		fprintf(s,"0");
		
		return 0;
	}
	
	k=1;
	for(i=0;i<NA;i++)
	{	
		hasha=(hasha*P+(int)A[i])%M;
		
		if(i>0)
		{	
			k*=P;
			k%=M;
		}	
	}
	
	for(i=0;i<NA;i++)
		hashb=(hashb*P+(int)B[i])%M;
	
	if(hasha==hashb && Compara(0,NA)==1)
		v1[++v1[0]]=0;
	
	for(i=1;i<=NB-NA;i++)
	{
		hashb = (hashb - ((int)B[i-1]*k) % M);
		if (hashb < 0) {
			hashb += M;
		}
		hashb*=P;
		hashb+=(int)B[i+NA-1];
		hashb%=M;
		
		if(hasha==hashb && Compara(i,NA)==1)
			v1[++v1[0]]=i;
	}	
	
	fprintf(s,"%d\n",v1[0]);
	
	for(i=1;i<=v1[0] &&i<=1000;i++)
		fprintf(s,"%d ",v1[i]);
	
	fclose (s);
	
	return 0;
}