#pragma GCC optimize("O3", "unroll-loops") // "Ofast"
#pragma GCC target("avx2", "bmi", "bmi2", "lzcnt", "popcnt")
#include <bits/stdc++.h>
#define int long long
#define vt vector
#define pb push_back
#define all(x) (x).begin(), (x).end()
#define sz(x) (int)(x).size()
#define f first
#define s second
#define dbg(x) cerr << #x << " = " << x << '\n'
#define bit(x, i) ((x) >> (i) & 1)
using namespace std;
using ll = long long;
using ld = long double;
using pii = pair<int, int>;
const int N = 1e6 + 5, mod = 1e9 + 7;
const ll inf = 1e18 + 7;
const ld eps = 1e-6;
int n, k, cnt[N];
string s;
void solve () {
cin >> n >> k >> s;
int l = 0, r = n - 1, i = 0;
while (l <= r) {
if (s[l] == 'P') l++;
else if (s[r] == 'P') r--;
else if (l < r && s[l + 1] == 'C') l++, cnt[i]++;
else if (l < r && s[r - 1] == 'C') r--, cnt[i]++;
else l++, cnt[i]++;
if (cnt[i] == k) {
cout << (i ? "DA" : "NE") << '\n';
return;
}
i ^= 1;
}
cout << '\n';
}
bool testcases = 0;
signed main() {
#ifdef ONLINE_JUDGE
freopen(".in", "r", stdin);
freopen(".out", "w", stdout);
#endif
cin.tie(0) -> sync_with_stdio(0);
int test = 1;
if (testcases) cin >> test;
for (int cs = 1; cs <= test; cs++) {
solve();
}
}
