#include <bits/stdc++.h>
using namespace std;

void main_program();

signed main(){
	ios_base::sync_with_stdio(0); cin.tie(0);
	main_program();
}

int n, M, L;
string s;
vector<vector<int>> v;

vector<int> mapping;

void create_mapping(){
	mapping.assign(256, 0);
	int crr = 0;
	for (char c = 'a'; c <= 'z'; c++) mapping[c] = crr++;
	for (char c = 'A'; c <= 'Z'; c++) mapping[c] = crr++;
	for (char c = '0'; c <= '9'; c++) mapping[c] = crr++;
	for (char c: "~!@#$%^&()[]`:;\"'<>,.?/|\\=-{}") mapping[c] = crr++;
}

void main_program(){
	cin >> n >> M >> L;
	cin >> s;

	create_mapping();

	v.assign(n * 2, vector<int>(n * 2));
	map<int, vector<int>> mp;

	for (int i = 0; i < n * 2; i++){
		for (int j = 0; j < L; j++){
			int H = 0;
			for (int k = 0; k < 4; k++){
				H = H * 92 + mapping[s[i * L * 4 + j * 4 + k]];
			}
			mp[H].push_back(i);
		}
	}

	vector<map<int, int>> connections(n * 2);
	for (auto [gene, lst]: mp){
		for (int i = 0; i < (int)lst.size(); i++){
			for (int j = i+1; j < (int)lst.size(); j++){
				connections[lst[i]][lst[j]]++;
			}
		}
	}

	vector<int> answer(n * 2, -1);
	for (int i = 0; i < n * 2; i++){
		if (answer[i] >= 0) continue;
		for (auto [j, cnt]: connections[i]){
			if (answer[j] >= 0) continue;
			if (cnt >= L/2){
				answer[i] = j; answer[j] = i;
				break;
			}
		}
	}

	for (int i = 0; i < n * 2; i++) cout << answer[i] + 1 << "\n";
}