#include<cstdio>
#include<cstring>
char A[2000010],B[2000010];
int pref[2000010];
int nr_rasp,rasp[2000010];
void prefix(char *s,int *p)
{
 int n=strlen(s+1);
 int k=0;
 p[1]=0;
 for(int i=2;i<=n;i++)
     {
      while(k>0 && s[i]!=s[k+1])
            k=p[k];
      if(s[i]==s[k+1])
         k++;
      p[i]=k;
     }
}
void potrivire(char *s,char *s1,int *p)
{
 int n=strlen(s+1),m=strlen(s1+1);
 int k=0;
 p[1]=0;
 for(int i=1;i<=m;i++)
     {
      while(k>0 && s[k+1]!=s1[i])
            k=p[k];
      if(s[k+1]==s1[i])
         k++;
      if(k==n)
         {
          if(nr_rasp<1000)
             {
              nr_rasp++;
              rasp[nr_rasp]=i-k+1;
             }
          else
             nr_rasp++;
         }
     }
}
int main()
{
 freopen("strmatch.in","r",stdin);
 freopen("strmatch.out","w",stdout);
 gets(A+1);
 gets(B+1);
 /*puts(A+1);
 printf("\n");
 puts(B+1);*/
 prefix(A,pref);
 potrivire(A,B,pref);
 printf("%d\n",nr_rasp);
 for(int i=1;i<=nr_rasp;i++)
     {
      if(rasp[i]==0)
         break;
      printf("%d ",rasp[i]-1);
     }
 printf("\n");
 return 0;
}