#include <fstream>
#define mod 1000000009
using namespace std;
int v[2000005];
int main()
{
    ifstream cin("strmatch.in");
    ofstream cout("strmatch.out");
    string a,b;
    long long nrA=0,nrB=0,cnt=0,put=1;
    cin>>a>>b;
    for(int i=0;i<a.size();i++)
    {
        nrA=(1LL*nrA*128+a[i])%mod;
        nrB=(1LL*nrB*128+b[i])%mod;
        put=(1LL*put*128)%mod;
    }
    if(nrA==nrB)
    {
        cnt++;
        v[cnt]=1;
    }
    for(int i=a.size();i<b.size();i++)
    {
        nrB=(long long)((1LL*nrB*128+b[i])%mod);
        nrB=(long long)((nrB-b[i-a.size()]*put)%mod);
        if(nrB<0)
            nrB+=mod;
        if(nrB==nrA)
        {
            cnt++;
            v[cnt]=i-a.size()+1;
        }
    }
    cout<<cnt<<'\n';
    for(int i=1;i<=min(cnt,1000LL);i++)
        cout<<v[i]<<" ";
    return 0;
}