#include <bits/stdc++.h>
using namespace std;
const int N = 1000000;
int n, m, s;
string a[N + 1];
int Sum[N + 1];
vector<int> son[N + 2];
int fa[N + 2];
int stk[N + 1], top;
int ans[N + 2];
void dfs(int x) {
  stk[top++] = x;
  ans[x] = stk[max(0, top - 1 - s)] - x;
  for (int i = 0; i < son[x].size(); i++) {
    int y = son[x][i];
    dfs(y);
  }
  top--;
}
int main() {
  cin >> n >> s >> m;
  for (int i = 1; i <= n; i++)
    cin >> a[i], Sum[i] = Sum[i - 1] + a[i].size() + 1;
  fa[n + 1] = n + 1;
  for (int i = n; i; i--) {
    fa[i] = fa[i + 1];
    while (Sum[fa[i] - 1] - Sum[i - 1] - 1 > m) fa[i]--;
    if (fa[i] != i) son[fa[i]].push_back(i);
  }
  for (int i = 1; i <= n + 1; i++)
    if (fa[i] == i) top = 0, dfs(i);
  int mx = *max_element(ans + 1, ans + n + 2);
  for (int i = 1; i <= n + 1; i++)
    if (ans[i] == mx) {
      while (s--) {
        for (int j = i; j < fa[i]; j++)
          cout << a[j] << (j < fa[i] - 1 ? " " : "");
        puts("");
        i = fa[i];
      }
      return 0;
    }
}
