#include<cstdio>
#include<cstring>
#define N 2000001
char s[N],u[N];
int v[1001],i,t,k,m,n,j,p[N],q;
int main()
{freopen("strmatch.in","r",stdin);
freopen("strmatch.out","w",stdout);
gets(s),gets(u);
m=strlen(s);
n=strlen(u);
for(i=2;i<m;i++)
      {while(k&&s[k+1]!=s[i])
              k=p[k];
      if(s[k+1]==s[i])
              k++;
      p[i]=k;}
for(j=1;j<n;j++)
      {while(q&&s[q+1]!=u[j])
              q=p[q];
      if(s[q+1]==u[j])
              q++;
      if(q==m-1&&s[0]==u[j-q])
              {if(t<1000)
                   v[t]=j-m+1;
              t++;}}
printf("%d\n",t);
if(t>1000)
      t=1000;
for(i=0;i<t;i++)
      printf("%d ",v[i]);
return 0;}