#include <iostream>
#include <string.h>
#include <fstream>
#define NMAX 2000000

using namespace std;

ifstream fin ("strmatch.in");
ofstream fout ("strmatch.out");

char A[NMAX],B[NMAX];
int f[NMAX],sol[NMAX],i,j,k,N;

void Citire()
{
    fin.getline(A,NMAX);
    fin.getline(B,NMAX);
}

void FAILURE(char A[NMAX])
{
  int k;
  f[0]=-1;
  for(j=1;j<strlen(A);++j)
      {
          k=f[j-1];
          while(k!=-1 && A[j-1]!=A[k])
                 k=f[k];
          f[j]=k+1;
      }

}
void KMP(char A[NMAX], char B[NMAX])
{
    i=0;
    j=0;
    while(i<strlen(B))
        {
            while(j!=-1 && A[j]!=B[i])
                    j=f[j];
            if(j==strlen(A)-1)
                {sol[++N]=i-strlen(A)+1;j=0;}
            else  ++i,++j;
        }
}
int main()
{
    Citire();
    FAILURE(A);
    KMP(A,B);
    fout<<N<<"\n";
    if(N<=1000)
      for(i=1;i<=N;++i)
          fout<<sol[i]<<" ";
    else
      for(i=1;i<=1000;++i)
          fout<<sol[i]<<" ";
    return 0;
}