#include <bits/stdc++.h>
using namespace std;
#define int long long
#define OYY LLONG_MAX
#define faster ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define fi first
#define se second
#define FOR for(int i=1;i<=n;i++)
#define mid (start+end)/2
#define pb push_back
#define lim 1000005
const int mod=998244353;
int n,m;
int cev[lim];
int32_t main(){
faster
cin>>n>>m;
set<int> st;
FOR{
st.insert(i-1);
}
for(int i=m;i<=m+n-1;i++){
int x=i;
for(int j=31;j>=0;j--){
if((1ll<<j)&x){
x-=(1ll<<j);
}
if(st.count(x)){
//cout<<x<<" "<<i<<endl;
cev[x]=i;
st.erase(x);
break;
}
}
}
FOR{
cout<<i-1<<" "<<cev[i-1]<<'\n';
}
return 0;
}
