#include <bits/stdc++.h>
using namespace std;
#define endl '\n'
#define ll long long
#define all(x) (x).begin(), (x).end()
int main() {
ios_base::sync_with_stdio(false);
cin.tie(NULL);
int n, k;
cin >> n >> k;
string s;
cin >> s;
s = "." + s;
vector<vector<int>> ans;
int ind[n + 10], sum[n + 10], cnt = 0;
memset(ind, 0, sizeof(ind));
memset(sum, 0, sizeof(sum));
for (int i = 1; i <= n; i++) {
cnt++;
ind[cnt] = i;
sum[cnt] = sum[cnt - 1] + (s[i] == 'c');
if (cnt >= k + 1 && sum[cnt] - sum[cnt - k - 1] == 1) {
vector<int> v;
for (int j = cnt - k; j <= cnt; j++) v.push_back(ind[j]);
ans.push_back(v);
cnt -= k + 1;
}
}
for (auto x : ans) {
for (auto el : x) cout << el << " ";
cout << endl;
}
}
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