#include <iostream>
#include <cmath>
using namespace std;
int start,stop;
int main(){
do{ //krok 1
cin>>start>>stop;
}while(stop<2*start);
for(int i = stop; i >= start; i--){ //krok 2
if(i%2==0) cout<<i<<", ";
}
while(start<=stop){ //krok 3
cout<<endl<<pow(start,3);
start++;
}
cout<<endl;
int p = 20; //krok 4
while(p>=10){
cout<<p<<", ";
p--;
}
}
//o to ci chodziło?