#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef __int128 vll;
typedef unsigned __int128 uvll;
ll _i=0;
#define ffn(x) _i=x
#define llll pair<ll , ll>
#define stitr set<ll>::iterator
#define fora(y,x) for(ll y=_i;x>y;y++)
#define pb push_back
#define pf push_front
#define debu cout << "hello\n"
#define fi first
#define sec second
#define all(a) a.begin() , a.end()
const ll limit = 1e13 + 7;
const ll ous=1e5 + 5;
const ll dx[4] = {0 , -1 , 1 , 0} , dy[4] = {1,0,0,-1};
void solve(){
ll n , m;cin >> n >> m;
for(ll i = n-1 , l = m;i>=0;){
for(ll j = l;j<n+m;++j){
if((i&j) == i){
ll o = j;
while(o>=l && ((o&i) == i)){
cout << i <<" " << o << "\n";
--i;--o;
}
l = j+1;
break;
}
}
}
return;/**/
}
signed main(){
ios_base::sync_with_stdio(false);cin.tie(NULL);
ll t=1;
//cin >> t;
while(t--){
solve();
}
return 0;
}
