#include <stdio.h>
#include <string.h>


long nr=0,sol[1002];
 char x[2000002];
 char y[2000002];
long KMPshift[2000002];
long n,m;
void preKMP ()
{ long i,j;
i=0;
j=KMPshift[0]=-1;
while (i<m)
{ while (j>-1&&y[i]!=y[j])
	                 j=KMPshift[j];
    ++i;
	++j;
	if (y[i]==y[j])
		      KMPshift[i]=KMPshift[j];
	else
		KMPshift[i]=j;
}
}



void KMP ()
{ long i,j;
//long KMPshift[2000002];
preKMP ();
i=j=0;
while (i<=n)
       {
		   while ((j>-1)&&(x[i]!=y[j]))
			               j=KMPshift[j];
		   ++i;++j;
		   if (j>=m)
		        {nr++;
				if (nr<=1000)	sol[nr]=i-j;
		         j=KMPshift[j];
				}
       }
}



int main ()
{ freopen ("strmatch.in","r",stdin);
  freopen ("strmatch.out","w",stdout);
//  char x[2000002];
 // char y[2000002];
  long i;
  gets(y);
  gets(x);
  n=strlen (x);
  m=strlen (y);
  KMP ();
  printf ("%ld\n",nr); 
  if (nr<=1000)
  for (i=1;i<=nr;i++)
	  printf ("%ld ",sol[i]);
       else
		     for (i=1;i<=1000;i++)
				 printf ("%ld ",sol[i]);
  return 0;
}