#include <iostream>
#include <cstdio>
#include <cstring>
using namespace std;
char pattern[2000001], text[2000001],*p;
int lps[2000001],len,n,nr,v[2000001];

void LPS()
{
     n=strlen(pattern);
lps[0]=0;
int i=1;
  while(i<n)
  {
      if(pattern[i]==pattern[len])
      {
      len++;
      lps[i]=len;
      i++;
      }
      else
          if(len!=0)
        len=lps[len-1];
        else
            lps[i++]=0;
  }
}

void afisare()
 {

    printf("%d\n", nr);
    if (n > 1000)
        n = 1000;
   for(int i=0;i<nr;++i)
    printf("%d ", v[i]);

}

int main()
{
   freopen("strmatch.in", "r", stdin);
    freopen("strmatch.out", "w", stdout);
  scanf("%s\n%s", &pattern, &text);
  int i=0,j=0;
  int m=strlen(text);
  LPS();
  while(i<m)
  {
     if(text[i]==pattern[j])
        i++,j++;
     else
     if(j!=0)
        j=lps[j-1];
     else
        i++;
     if(j==n)
     {
        v[nr++]=i-j;
         j=lps[j-1];
     }

  }

  afisare();

    return 0;
}