#include <bits/stdc++.h>
#define ll long long  
using namespace std;     
signed main() 
{
     ll sz,n; cin>>sz>>n;
     vector<ll>a(n);
     for(ll i=0;i<n;i++) cin>>a[i];
     vector<vector<ll>>ans;
     for(ll i=0;i<sz-1;i++) a.insert(a.begin(),0);
     reverse(a.begin(),a.end());
     for(ll i=0;i<n;i++)
     {  
        vector<ll>curr;
        for(ll j=i;j<i+sz;j++) curr.push_back(a[j]);
        ans.push_back(curr);
     }
      reverse(ans.begin(),ans.end());
      for(ll i=0;i<ans.size();i++)
      {
        for(ll j=0;j<ans[i].size();j++) cout<<ans[i][j]<<" ";
        cout<<endl;
      }
    return 0;
}

#include <bits/stdc++.h>
using namespace std;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
typedef tree<int, null_type, less_equal<int>, rb_tree_tag, tree_order_statistics_node_update> pbds;
vector<int> ttl_cache(int n, vector<vector<int>> entries, vector<int> queries){
    int q = queries.size();

    vector<pair<int,int>> arr;
    for(int i=0;i<q;i++){
        arr.push_back({queries[i],i});
    }
    sort(arr.begin(),arr.end());

    vector<int> res(q);
    pbds st;

    int i=0;
    int x = arr[i].first;
    sort(entries.begin(), entries.end());
    for(auto &v:entries){
        while(v[0]>x){
            res[arr[i].second] = st.size() - st.order_of_key(x);
            i++;
            if(i==q) return res;
            x = arr[i].first;
        }
        st.insert(v[0]+v[1]);
    }

    for(;i<q;i++){
        x = arr[i].first;
        res[arr[i].second] = st.size() - st.order_of_key(x);
    }
    return res;
}

int countBits(int v) { 
    int count = 0; 
    while (v > 0) { 
        count += v & 1; 
        v >>= 1; 
    } 
    return count; 
} 

string palindromeChecker(string s, vector<int> startIndex, vector<int> endIndex, vector<int> subs) { 
    int bp = 0; 
    string myString = ""; 
    vector<int> L; 
    L.push_back(bp); 

    for (char i : s) { 
        int ci = i - 'a'; 
        bp = bp ^ (1 << ci); 
        L.push_back(bp); 
    } 

    int q = startIndex.size(); 
    int c1 = L[startIndex[0]]; 
    int c2 = L[endIndex[0] + 1]; 
    int di = c1 ^ c2; 
    int ooc = countBits(di); 
    bool r = (ooc - subs[0] * 2) <= 1; 

    if (r) { 
        myString = "1"; 
    } else { 
        myString = "0"; 
    } 

    return myString; 
}