#include<fstream>
#include<cstring>
using namespace std;
int n, m, i, L, p[2000005], sol[1005], nrap;
char a[2000005], b[2000005];
ifstream in("strmatch.in");
ofstream out("strmatch.out");
int main()
{
    in>>a+1;
    in>>b+1;
    n=strlen(a+1);
    m=strlen(b+1);
    for(i=2; i<=n; i++)
    {
        while(L!=0 && a[L+1]!=a[i])
            L=p[L];
        if(a[L+1]==a[i])
            L++;
        p[i]=L;
    }
    L=0;
    for(i=1; i<=m; i++)
    {
        while(L!=0 && a[L+1]!=b[i])
            L=p[L];
        if(a[L+1]==b[i])
            L++;
        if(L==n)
        {
            nrap++;
            if(nrap<=1000)
                sol[nrap]=i-n;
            L=p[L];
        }
    }
    out<<nrap<<"\n";
    for(i=1; i<=min(nrap, 1000); i++)
        out<<sol[i]<<" ";
    return 0;
}