#include <cstdio>
#include <string.h>
using namespace std;
int i,m,n,d,nr,min,p[2000000],sol[2000000];
char a[2000000],b[2000000];
void prefix(void)
{
    p[0]=0;
    for (i=1;i<=m-1;i++)
         if (a[i]==a[p[i-1]])p[i]=p[i-1]+1;
                          else p[i]=0;
};

void solve(void)
{
  d=0;
  i=-1;
  nr=0;
  while (i<n-1)
    {
      i++;
      if (a[d]==b[i])if (d==m-1){nr++;sol[nr]=i-m+1;d=p[d]+1;}
                          else d++;
                else while((a[p[d-1]+1]!=b[i])&&(d>0)){d=p[d-1];};
    };
   printf("%d\n",nr);

   if (min>1000)min=1000;
            else min=nr;
   for (i=1;i<=min;i++)printf("%d ",sol[i]);
};

int main()
{
    freopen("strmatch.in","r",stdin);
    freopen("strmatch.out","w",stdout);
    scanf("%s",a);
    scanf("%s",b);
    m= strlen(a);
    n=strlen(b);
    prefix();
    solve();
    return 0;
}