#include <fstream>
#include <cstring>
#define NMAX 2000001
using namespace std;
ifstream fin("strmatch.in");
ofstream fout("strmatch.out");
int i,j,n1,n2,rez[NMAX],k,ok,l[NMAX],p;
char s1[NMAX],s2[NMAX];
int main()
{
    fin.get(s2,NMAX);
    fin.get();
    fin.get(s1,NMAX);
    n1=strlen(s1);
    n2=strlen(s2);
    i=0;
    j=-1;
    if(n2>n1)
        fout<<0<<'\n';
    else
    {
        l[1]=0;
        for(p=2;p<=n2;++p)
        {
            k=l[p-1];
            while(k>0&&s2[k+1]!=s2[p])
                k=l[k];
            if(s2[k+1]==s2[p])
                k++;
            l[p]=k;
        }
    for(i=0;i<n1;++i)
    {
        while(j>=0&&s1[i]!=s2[j+1])
            j=l[j]-1;
        if(s1[i]==s2[j+1])
            j++;
        if(j+1==n2)
            {rez[++k]=i-j;j=l[j];}
    }
    fout<<k<<'\n';
    for(i=1;i<=k;++i)
        fout<<rez[i]<<" ";
        }
    return 0;
}