#include<algorithm>
#include<bitset>
#include<cassert>
#include<cfloat>
#include<climits>
#include<cmath>
#include<deque>
#include<functional>
#include<iomanip>
#include<iostream>
#include<map>
#include<queue>
#include<array>
#include<set>
#include<stack>
#include<string>
#include<unordered_map>
#include<unordered_set>
#include<utility>
#include<vector>

#define REP(i, n) for(int i = 0;i < n;i++)
#define REPR(i, n) for(int i = n;i >= 0;i--)
#define FOR(i, m, n) for(int i = m;i < n;i++)
#define FORR(i, m, n) for(int i = m;i >= n;i--)
#define SORT(v, n) sort(v, v+n);
#define VSORT(v) sort(v.begin(), v.end());
#define llong long long
#define pb(a) push_back(a)

using namespace std;

typedef long long int ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;


template<typename T>
vector<T> make_v(size_t a) { return vector<T>(a); }
template<typename T, typename... Ts>
auto make_v(size_t a, Ts... ts) {
	return vector<decltype(make_v<T>(ts...))>(a, make_v<T>(ts...));
}
template<typename T, typename V>
typename enable_if<is_class<T>::value == 0>::type
fill_v(T& t, const V& v) { t = v; }
template<typename T, typename V>
typename enable_if<is_class<T>::value != 0>::type
fill_v(T& t, const V& v) {
	for (auto& e : t) fill_v(e, v);
}


template <typename T>
bool chmax(T & a, const T & b) {
	if (a < b) {
		a = b;
		return true;
	}
	return false;
}
template <typename T>
bool chmin(T & a, const T & b) {
	if (a > b) {
		a = b;
		return true;
	}
	return false;
}


#define ARRAY_MAX 100005
const int INF = 1e9 + 7;
constexpr ll MOD = 1e9 + 7;

int dx4[4] = { 1,0,0,-1 };
int dy4[4] = { 0,1,-1,0 };
int dx2[2] = { 1,0 };
int dy2[2] = { 0,1 };

/******************************************************************************************/
typedef tuple<int,int,int> tpl;

ll modPow(long long a, long long n, long long p) {
  if (n == 1) return a % p;
  if (n % 2 == 1) return (a * modPow(a, n - 1, p)) % p;
  long long t = modPow(a, n / 2, p);
  return (t * t) % p;
}

long long pow(long long a,long long n){
  long long ret=1;
  for(;n>0;n>>=1,a=a*a%MOD){
    if(n%2==1){
      ret=ret*a%MOD;

    }
  }
  return ret;
}
// a^-1
long long modinv(long long a, long long m) {
    long long b = m, u = 1, v = 0;
    while (b) {
        long long t = a / b;
        a -= t * b; swap(a, b);
        u -= t * v; swap(u, v);
    }
    u %= m;
    if (u < 0) u += m;
    return u;
}

ll dp[200005][5];//r:0,p:1,s:2

int main() {

	cin.tie(0);
	ios::sync_with_stdio(false);
	cout << fixed << setprecision(10);

	ll N,K,R,S,P;
	cin >> N >> K >> R >> S >> P;
	string T;
	cin >> T;
	
	for (int st = 0; st < K; st++)
	{
		//はじめに出すindex
		for (int i = st; i < N; i+=K)
		{
			//modKでのdp
			if(T[i] == 's'){
				chmax(dp[i+K][0],dp[i][1]+R);
				chmax(dp[i+K][0],dp[i][2]+R);
				dp[i+K][0]%=MOD;
			}
			if(T[i] == 'r'){
				chmax(dp[i+K][1],dp[i][0]+P);
				chmax(dp[i+K][1],dp[i][2]+P);
				dp[i+K][1]%=MOD;
			}
			if(T[i] == 'p'){
				chmax(dp[i+K][2],dp[i][0]+S);
				chmax(dp[i+K][2],dp[i][1]+S);
				dp[i+K][2]%=MOD;
			}
			chmax(dp[i+K][2],dp[i][0]);
			chmax(dp[i+K][2],dp[i][1]);
			chmax(dp[i+K][1],dp[i][0]);
			chmax(dp[i+K][1],dp[i][2]);
			chmax(dp[i+K][0],dp[i][1]);
			chmax(dp[i+K][0],dp[i][2]);
			dp[i+K][0]%=MOD;
			dp[i+K][1]%=MOD;
			dp[i+K][2]%=MOD;
		}
	}	

	ll ans = 0;
	for(int i = N+K-1;i >= N;i--){
		ans += max(dp[i][0],max(dp[i][1],dp[i][2]));
		ans %= MOD;
	}	
	cout << ans << endl;



	return 0;
}






Measured memory_bytes: 5840