#include <fstream>
#include <cstring>
#define N 2000010

std::ifstream in ("strmatch.in");
std::ofstream out ("strmatch.out");
char s[N],w[N];
long pmt[N],i,k,c[N],l=0,n,m;

void ff (char *a) {
    pmt[0]=-1;
    for (i=1; i<=m; i++) if (a[i-1]==a[pmt[i-1]]) pmt[i]=pmt[i-1]+1;
}

void kmp (char *s,char *w) {
    k=0; i=0;
    while (k+i<n) {
        if (w[i]==s[k+i]) {
            if (i==m-1) c[l++]=k;
            i++;
        }
        else {
            k=k+i-pmt[i];
            if (pmt[i]>-1) i=pmt[i];
            else i=0;
        }
    }
}

int main () {
    in.getline (w,N);
    in.getline (s,N);
    m=strlen (w);
    n=strlen (s);
    ff (w);
    kmp (s,w);
    out<<l<<"\n";
    if (l>1000) l=1000;
    for (i=0; i<l; i++) out<<c[i]<<" ";
    out<<"\n";
    return 0;
}