#include <iostream>
#include <fstream>
#include <string.h>
#define Nmax 2000005
using namespace std;
ifstream f("strmatch.in");
ofstream g("strmatch.out");
char t[Nmax],p[Nmax];
int n,m,urm[Nmax],c,v[Nmax];
void urmatorul(char *p)
{
    int k=-1,x;
    urm[0]=0;
    for(x=1;x<=m;++x)
    {
        while(k>0 && p[k+1]!=p[x]) k=urm[k];
        if (p[k+1]==p[x]) ++k;
        urm[x]=k;
    }
}
int main()
{
   int i,x=-1;
   f.getline(p,Nmax);
   f.getline(t,Nmax);
   n=strlen(t);
   m=strlen(p);
    urmatorul(p);
    for(i=0;i<n;++i)
    {
        while(x>0 && p[x+1]!=t[i]) x=urm[x];
        if (p[x+1]==t[i]) ++x;
        if (x==m-1)
        {
            x=urm[x];
            ++c;
            v[c]=i-m+1;
        }
    }
    g<<c<<"\n";
    for(i=1;i<=c;++i) g<<v[i]<<" ";
    return 0;
}