Problem:
Score : 400 points

Problem Statement

At an arcade, Takahashi is playing a game called RPS Battle, which is played as follows:

The player plays N rounds of Rock Paper Scissors against the machine. (See Notes for the description of Rock Paper Scissors. A draw also counts as a round.)

Each time the player wins a round, depending on which hand he/she uses, he/she earns the following score (no points for a draw or a loss):

R points for winning with Rock;

S points for winning with Scissors;

P points for winning with Paper.

However, in the i-th round, the player cannot use the hand he/she used in the (i-K)-th round. (In the first K rounds, the player can use any hand.)

Before the start of the game, the machine decides the hand it will play in each round. With supernatural power, Takahashi managed to read all of those hands.

The information Takahashi obtained is given as a string T. If the i-th character of T (1 \leq i \leq N) is r, the machine will play Rock in the i-th round. Similarly, p and s stand for Paper and Scissors, respectively.

What is the maximum total score earned in the game by adequately choosing the hand to play in each round?

Notes

In this problem, Rock Paper Scissors can be thought of as a two-player game, in which each player simultaneously forms Rock, Paper, or Scissors with a hand.

If a player chooses Rock and the other chooses Scissors, the player choosing Rock wins;

if a player chooses Scissors and the other chooses Paper, the player choosing Scissors wins;

if a player chooses Paper and the other chooses Rock, the player choosing Paper wins;

if both players play the same hand, it is a draw.

Constraints

2 \leq N \leq 10^5

1 \leq K \leq N-1

1 \leq R,S,P \leq 10^4

N,K,R,S, and P are all integers.

|T| = N

T consists of r, p, and s.

Input

Input is given from Standard Input in the following format:

N K
R S P
T

Output

Print the maximum total score earned in the game.

Sample Input 1

5 2
8 7 6
rsrpr

Sample Output 1

27

The machine will play {Rock, Scissors, Rock, Paper, Rock}.

We can, for example, play {Paper, Rock, Rock, Scissors, Paper} against it to earn 27 points.
We cannot earn more points, so the answer is 27.

Sample Input 2

7 1
100 10 1
ssssppr

Sample Output 2

211

Sample Input 3

30 5
325 234 123
rspsspspsrpspsppprpsprpssprpsr

Sample Output 3

4996

Solution in Java8 (OpenJDK 1.8.0) (judge verdict: Accepted)

//繰り返し二乗法 repow(b,p)(b,p,modder)
//ユークリッド互除法で最大公約数 gcd
//gcdで最小公倍数 lcm
//約数列挙divList(int)
//約数列挙divSet(int)
//素数判定iP(long)とtameshiwari(long)
//二項係数クラスNCK
////NCK(max,modder)
////pre(max,modder)
////nCk(n,k)
//BSA()()()(List<T>,T,int,int,Comparator<T>)
//BSF()()()(List<T>,T,int,int,Comparator<T>)
//BSL()()()(List<T>,T,int,int,Comparator<T>)
//BSA()()()(T[],T,int,int,Comparator<T>)
//BSF()()()(T[],T,int,int,Comparator<T>)
//BSL()()()(T[],T,int,int,Comparator<T>)
//BSA()()()(int[],int,int,int,syojun)
//BSF()()()(int[],int,int,int,syojun)
//BSL()()()(int[],int,int,int,syojun)
//int kmp(String t,String p)
//文字列文字ソートStSort(String)
//二次元整数座標オブジェクトXy
////マンハッタン距離manht(Xy)
////toString
////偏角ソート用hencom
////偏角henkaku
////equals
//ユニオンファインドUnFd
////boolean isRoot(i)
////int rootOf(i)
////boolean ud(i,j)
////boolean marge(i,j)
////int[] roots()
//スキャナーScnr
////next nextBuilder nextInt nextLong nextDouble()
////nextAInt nextALong nextADouble(n)(a[],n)(a[],off,len)
////nextLInt nextLLong nextLDouble(n)
//static PrintWriter out = new PrintWriter(System.out);
import java.util.*;
import java.io.*;

class Main{
  static int repow(int b,int p){
    long a = b;
    long res=1;
    while(p>0){
      if(p%2==1){
        res*=a;
      }
      a*=a;
      p/=2;
    }
    return (int)res;
  }
  static int repow(int b,int p,int modder){
    long a = b%modder;
    long res=1;
    while(p>0){
      if(p%2==1){
        res=(res*a)%modder;
      }
      a=(a*a)%modder;
      p/=2;
    }
    return (int)res;
  }
  static long repow(long b,long p){
    long a = b;
    long res=1;
    while(p>0){
      if(p%2==1){
        res*=a;
      }
      a*=a;
      p/=2;
    }
    return res;
  }
  static long repow(long b,long p,long modder){
    long a = b%modder;
    long res=1;
    while(p>0){
      if(p%2==1){
        res=(res*a)%modder;
      }
      a=(a*a)%modder;
      p/=2;
    }
    return res;
  }
  static long gcd(long c,long d){
    while(true){
      long f=c%d;
      if(f==0){
        return d;
      }
      c=d;
      d=f;
    }
  }
  static long lcm(long c,long d){
    return c/gcd(c,d)*d;
  }
  static ArrayList<Integer> divList(int n){
    ArrayList<Integer> div=new ArrayList<Integer>();
    for(int i=1;i*i<=n;i++){
      if(n%i==0){
        div.add(i);
        if(i*i!=n){
          div.add((int)(n/i));
        }
      }
    }
    return div;
  }
  static HashSet<Integer> divSet(int n){
    HashSet<Integer> div=new HashSet<Integer>();
    for(int i=1;i*i<=n;i++){
      if(n%i==0){
        div.add(i);
        div.add((int)(n/i));
      }
    }
    return div;
  }
  static boolean iP(long n){
    if(n==2){
      return true;
    }
    if((n&1)==0||n==1){
      return false;
    }
//    if(n>3037007383L){
    if(n>Integer.MAX_VALUE){
      return tameshiwari(n);
    }
    long d=n-1;
    int s=0;
    while((d&1)==0){
      d/=2;
      s++;
    }
    int[] aa = {2,3,5,7,11,13,17};
    for(int i=0;i<7&&aa[i]<n;i++){
      int a = aa[i];
      long t = d;
      long y=repow(a,t,n);
      while(t!=n-1&&y!=1&&y!=n-1){
        y = (y*y)%n;
        t=t<<1;
      }
      if(y!=n-1&&(t&1)==0){
        return false;
      }
    }
    return true;
  }
  static boolean tameshiwari(long n){
    for(long i=2;i*i<=n;i++){
      if(n%i==0){
        return false;
      }
    }
    return true;
  }
  static class NCK{
    int max;
    int modder;
    long[] fac;
    long[] finv;
    long[] inv;
    NCK(){
      this(510000,1000000007);
    }
    NCK(int max,int modder){
      this.max=max;
      this.modder=modder;
      pre();
    }
    void pre(){
      fac = new long[max];
      finv = new long[max];
      inv = new long[max];
      fac[0]=fac[1]=1;
      finv[0]=finv[1]=1;
      inv[1]=1;
      for(int i=2;i<max;i++){
        fac[i]=fac[i-1]*i%modder;
        inv[i]=modder-inv[modder%i]*(modder/i)%modder;
        finv[i]=finv[i-1]*inv[i]%modder;
      }
    }
    long nCk(int n,int k){
      if(n<k){return 0;}
      if(n<0||k<0){return 0;}
      return fac[n]*(finv[k]*finv[n-k]%modder)%modder;
    }
  }
  static <T extends Comparable<T>> int BSA(List<T> l,T target){
    return BSA(l,target,0,l.size(),(s1,s2)->s1.compareTo(s2));
  }
  static <T> int BSA(List<T> l,T target,Comparator<T> c){
    return BSA(l,target,0,l.size(),c);
  }
  static <T extends Comparable<T>> int BSA(List<T> l,T target,int left,int right){
    return BSA(l,target,left,right,(s1,s2)->s1.compareTo(s2));
  }
  static <T> int BSA(List<T> l,T target,int left,int right,Comparator<T> c){
    int lt = left;
    int rt = right-1;
    while(lt<=rt){
      T gaze=l.get(lt+(rt-lt)/2);
      if(c.compare(gaze,target)<0){
        lt=lt+(rt-lt)/2+1;
      }else if(c.compare(gaze,target)>0){
        rt=lt+(rt-lt)/2-1;
      }else{
        return lt+(rt-lt)/2;
      }
    }
    return -1;
  }
  static <T extends Comparable<T>> int BSF(List<T> l,T target){
    return BSF(l,target,0,l.size(),(s1,s2)->s1.compareTo(s2));
  }
  static <T> int BSF(List<T> l,T target,Comparator<T> c){
    return BSF(l,target,0,l.size(),c);
  }
  static <T extends Comparable<T>> int BSF(List<T> l,T target,int left,int right){
    return BSF(l,target,left,right,(s1,s2)->s1.compareTo(s2));
  }
  static <T> int BSF(List<T> l,T target,int left,int right,Comparator<T> c){
    int lt = left;
    int rt = right-1;
    while(lt<=rt){
      T gaze=l.get(lt+(rt-lt)/2);
      if(c.compare(gaze,target)<0){
        lt=lt+(rt-lt)/2+1;
      }else if(c.compare(gaze,target)>=0){
        rt=lt+(rt-lt)/2-1;
      }
    }
    return lt;
  }
  static <T extends Comparable<T>> int BSL(List<T> l,T target){
    return BSL(l,target,0,l.size(),(s1,s2)->s1.compareTo(s2));
  }
  static <T> int BSL(List<T> l,T target,Comparator<T> c){
    return BSL(l,target,0,l.size(),c);
  }
  static <T extends Comparable<T>> int BSL(List<T> l,T target,int left,int right){
    return BSL(l,target,left,right,(s1,s2)->s1.compareTo(s2));
  }
  static <T> int BSL(List<T> l,T target,int left,int right,Comparator<T> c){
    int lt = left;
    int rt = right-1;
    while(lt<=rt){
      T gaze=l.get(lt+(rt-lt)/2);
      if(c.compare(gaze,target)<=0){
        lt=lt+(rt-lt)/2+1;
      }else if(c.compare(gaze,target)>0){
        rt=lt+(rt-lt)/2-1;
      }
    }
    return lt;
  }
  static <T extends Comparable<T>> int BSA(T[] a,T target){
    return BSA(a,target,0,a.length,(s1,s2)->s1.compareTo(s2));
  }
  static <T> int BSA(T[] a,T target,Comparator<T> c){
    return BSA(a,target,0,a.length,c);
  }
  static <T extends Comparable<T>> int BSA(T[] a,T target,int left,int right){
    return BSA(a,target,left,right,(s1,s2)->s1.compareTo(s2));
  }
  static <T> int BSA(T[] a,T target,int left,int right,Comparator<T> c){
    int lt = left;
    int rt = right-1;
    while(lt<=rt){
      T gaze=a[lt+(rt-lt)/2];
      if(c.compare(gaze,target)<0){
        lt=lt+(rt-lt)/2+1;
      }else if(c.compare(gaze,target)>0){
        rt=lt+(rt-lt)/2-1;
      }else{
        return lt+(rt-lt)/2;
      }
    }
    return -1;
  }
  static <T extends Comparable<T>> int BSF(T[] a,T target){
    return BSF(a,target,0,a.length,(s1,s2)->s1.compareTo(s2));
  }
  static <T> int BSF(T[] a,T target,Comparator<T> c){
    return BSF(a,target,0,a.length,c);
  }
  static <T extends Comparable<T>> int BSF(T[] a,T target,int left,int right){
    return BSF(a,target,left,right,(s1,s2)->s1.compareTo(s2));
  }
  static <T> int BSF(T[] a,T target,int left,int right,Comparator<T> c){
    int lt = left;
    int rt = right-1;
    while(lt<=rt){
      T gaze=a[lt+(rt-lt)/2];
      if(c.compare(gaze,target)<0){
        lt=lt+(rt-lt)/2+1;
      }else if(c.compare(gaze,target)>=0){
        rt=lt+(rt-lt)/2-1;
      }
    }
    return lt;
  }
  static <T extends Comparable<T>> int BSL(T[] a,T target){
    return BSL(a,target,0,a.length,(s1,s2)->s1.compareTo(s2));
  }
  static <T> int BSL(T[] a,T target,Comparator<T> c){
    return BSL(a,target,0,a.length,c);
  }
  static <T extends Comparable<T>> int BSL(T[] a,T target,int left,int right){
    return BSL(a,target,left,right,(s1,s2)->s1.compareTo(s2));
  }
  static <T> int BSL(T[] a,T target,int left,int right,Comparator<T> c){
    int lt = left;
    int rt = right-1;
    while(lt<=rt){
      T gaze=a[lt+(rt-lt)/2];
      if(c.compare(gaze,target)<=0){
        lt=lt+(rt-lt)/2+1;
      }else if(c.compare(gaze,target)>0){
        rt=lt+(rt-lt)/2-1;
      }
    }
    return lt;
  }
  static int BSA(int[] a,int target){
    return BSA(a,target,0,a.length,true);
  }
  static int BSA(int[] a,int target, boolean syojun){
    return BSA(a,target,0,a.length,syojun);
  }
  static int BSA(int[] a,int target,int left,int right){
    return BSA(a,target,left,right,true);
  }
  static int BSA(int[] a,int target,int left,int right,boolean syojun){
    int lt = left;
    int rt = right-1;
    while(lt<=rt){
      int gaze=a[lt+(rt-lt)/2];
      if((syojun&&gaze<target)||(!syojun&&gaze>target)){
        lt=lt+(rt-lt)/2+1;
      }else if((syojun&&gaze>target)||(!syojun&&gaze<target)){
        rt=lt+(rt-lt)/2-1;
      }else{
        return lt+(rt-lt)/2;
      }
    }
    return -1;
  }
  static int BSF(int[] a,int target){
    return BSF(a,target,0,a.length,true);
  }
  static int BSF(int[] a,int target,boolean syojun){
    return BSF(a,target,0,a.length,syojun);
  }
  static int BSF(int[] a,int target,int left,int right){
    return BSF(a,target,left,right,true);
  }
  static int BSF(int[] a,int target,int left,int right,boolean syojun){
    int lt = left;
    int rt = right-1;
    while(lt<=rt){
      int gaze=a[lt+(rt-lt)/2];
      if((syojun&&gaze<target)||(!syojun&&gaze>target)){
        lt=lt+(rt-lt)/2+1;
      }else if((syojun&&gaze<=target)||(!syojun&&gaze>=target)){
        rt=lt+(rt-lt)/2-1;
      }
    }
    return lt;
  }
  static int BSL(int[] a,int target){
    return BSL(a,target,0,a.length,true);
  }
  static int BSL(int[] a,int target,boolean syojun){
    return BSL(a,target,0,a.length,syojun);
  }
  static int BSL(int[] a,int target,int left,int right){
    return BSL(a,target,left,right,true);
  }
  static int BSL(int[] a,int target,int left,int right,boolean syojun){
    int lt = left;
    int rt = right-1;
    while(lt<=rt){
      int gaze=a[lt+(rt-lt)/2];
      if((syojun&&gaze<=target)||(!syojun&&gaze>=target)){
        lt=lt+(rt-lt)/2+1;
      }else if((syojun&&gaze>target)||(!syojun&&gaze<target)){
        rt=lt+(rt-lt)/2-1;
      }
    }
    return lt;
  }
  static int BSA(long[] a,long target){
    return BSA(a,target,0,a.length,true);
  }
  static int BSA(long[] a,long target, boolean syojun){
    return BSA(a,target,0,a.length,syojun);
  }
  static int BSA(long[] a,long target,int left,int right){
    return BSA(a,target,left,right,true);
  }
  static int BSA(long[] a,long target,int left,int right,boolean syojun){
    int lt = left;
    int rt = right-1;
    while(lt<=rt){
      long gaze=a[lt+(rt-lt)/2];
      if((syojun&&gaze<target)||(!syojun&&gaze>target)){
        lt=lt+(rt-lt)/2+1;
      }else if((syojun&&gaze>target)||(!syojun&&gaze<target)){
        rt=lt+(rt-lt)/2-1;
      }else{
        return lt+(rt-lt)/2;
      }
    }
    return -1;
  }
  static int BSF(long[] a,long target){
    return BSF(a,target,0,a.length,true);
  }
  static int BSF(long[] a,long target,boolean syojun){
    return BSF(a,target,0,a.length,syojun);
  }
  static int BSF(long[] a,long target,int left,int right){
    return BSF(a,target,left,right,true);
  }
  static int BSF(long[] a,long target,int left,int right,boolean syojun){
    int lt = left;
    int rt = right-1;
    while(lt<=rt){
      long gaze=a[lt+(rt-lt)/2];
      if((syojun&&gaze<target)||(!syojun&&gaze>target)){
        lt=lt+(rt-lt)/2+1;
      }else if((syojun&&gaze<=target)||(!syojun&&gaze>=target)){
        rt=lt+(rt-lt)/2-1;
      }
    }
    return lt;
  }
  static int BSL(long[] a,long target){
    return BSL(a,target,0,a.length,true);
  }
  static int BSL(long[] a,long target,boolean syojun){
    return BSL(a,target,0,a.length,syojun);
  }
  static int BSL(long[] a,long target,int left,int right){
    return BSL(a,target,left,right,true);
  }
  static int BSL(long[] a,long target,int left,int right,boolean syojun){
    int lt = left;
    int rt = right-1;
    while(lt<=rt){
      long gaze=a[lt+(rt-lt)/2];
      if((syojun&&gaze<=target)||(!syojun&&gaze>=target)){
        lt=lt+(rt-lt)/2+1;
      }else if((syojun&&gaze>target)||(!syojun&&gaze<target)){
        rt=lt+(rt-lt)/2-1;
      }
    }
    return lt;
  }
  static int kmp(String t,String p){
    int[] f=new int[p.length()+1];
    int i=0;
    int j=1;
    f[1]=0;
    while(j<p.length()){
      if(i==0||p.charAt(i-1)==p.charAt(j-1)){
        i++;
        j++;
        f[j]=i;
      }else{
        i=f[i];
      }
    }
    i=1;
    j=1;
    while(i<=p.length()&&j<=t.length()){
      if(i==0||p.charAt(i-1)==t.charAt(j-1)){
        i++;
        j++;
      }else{
        i=f[i];
      }
    }
    return i==(p.length()+1)?j-i:-1;
  }
  static String StSort(String s){
    StringBuilder sb = new StringBuilder(s);
    int lg = sb.length();
    int l;
    int r;
    int gaze;
    for(int i=1;i<lg;i++){
      l=0;
      r=i-1;
      while(l<=r){
        gaze=(l+r)/2;
        if(sb.charAt(gaze)<=sb.charAt(i)){
          l=gaze+1;
        }else if(sb.charAt(gaze)>sb.charAt(i)){
          r=gaze-1;
        }
      }
      sb.insert(l,sb.charAt(i));
      sb.deleteCharAt(i+1);
    }
    return sb.toString();
  }
  static class Xy{
    int x;
    int y;
    Xy(int x,int y){
      this.x=x;
      this.y=y;
    }
    public int manht(Xy o){
      return Math.abs(x-o.x)+Math.abs(y-o.y);
    }
    public String toString(){
      return "["+x+","+y+"]";
    }
    public double henkaku(){
      return Math.atan2(y,x);
    }
    public static int hencom(Xy s1,Xy s2){
      return (int)Math.signum(s1.henkaku()-s2.henkaku());
    }
    public boolean equals(Object o){
      return x==((Xy)o).x&&y==((Xy)o).y;
    }
  }
  static class UnFd{
    int n;
    int[] a;
    int forest;
    UnFd(int n){
      forest=this.n=n;
      a = new int[n];
      for(int i=0;i<n;i++){
        a[i] = i;
      }
    }
    boolean isRoot(int i){
      return a[i]==i;
    }
    int rootOf(int i){
      if(isRoot(i)){
        return i;
      }
      return a[i] = rootOf(a[i]);
    }
    boolean ud(int i,int j){
      return rootOf(i)==rootOf(j);
    }
    boolean marge(int i,int j){
      if(ud(i,j)){
        return false;
      }
      i=rootOf(i);
      j=rootOf(j);
      a[Integer.max(i,j)]=Integer.min(i,j);
      forest-=1;
      return true;
    }
    int[] roots(){
      int[] rs = new int[forest];
      int p=0;
      for(int i=0;i<n;i++){
        if(isRoot(i)){
          rs[p]=i;
          p++;
        }
      }
      return rs;
    }
  }
  static class Scnr{
    private final InputStream ins;
    private final byte[] buffer = new byte[1024];
    private int ptr = 0;
    private int buflen = 0;
    Scnr(){
      this(System.in);
    }
    Scnr(InputStream in){
      ins = in;
    }
    private boolean hasNextByte(){
      if(ptr<buflen){
        return true;
      }else{
        ptr = 0;
        try{
          buflen = ins.read(buffer);
        }catch(IOException e){
          e.printStackTrace();
        }
        if(buflen<=0){
          return false;
        }
      }
      return true;
    }
    private int readByte(){
      if(hasNextByte()){
        return buffer[ptr++];
      }else{
        return -1;
      }
    }
    private static boolean isPrintableChar(int c){
      return 33<=c&&c<=126;
    }
    public boolean hasNext(){
      while(hasNextByte()&&!isPrintableChar(buffer[ptr])){
        ptr++;
      }
      return hasNextByte();
    }
    public String next(){
      return nextBuilder().toString();
    }
    public StringBuilder nextBuilder(){
      if(!hasNext()){
        throw new NoSuchElementException();
      }
      StringBuilder sb = new StringBuilder();
      int b = readByte();
      while(isPrintableChar(b)){
        sb.appendCodePoint(b);
        b = readByte();
      }
      return sb;
    }
    public double nextDouble(){
      return Double.parseDouble(next());
    }
    public long nextLong(){
      if(!hasNext()){
        throw new NoSuchElementException();
      }
      long n = 0;
      boolean minus = false;
      int b = readByte();
      if(b=='-'){
        minus=true;
        b=readByte();
      }
      if(b<'0'||'9'<b){
        throw new NumberFormatException();
      }
      while(true){
        if('0'<=b&&b<='9'){
          n*=10;
          n+=b-'0';
        }else if(b==-1||!isPrintableChar(b)){
          return minus?-n:n;
        }else{
          throw new NumberFormatException();
        }
        b=readByte();
      }
    }
    public int nextInt(){
      long nl=nextLong();
      if(nl<Integer.MIN_VALUE||Integer.MAX_VALUE<nl){
        throw new NumberFormatException();
      }
      return (int) nl;
    }
    public int[] nextAInt(int n){
      int[] a = new int[n];
      nextAInt(a,n);
      return a;
    }
    public void nextAInt(int[] a,int n){
      nextAInt(a,0,n);
    }
    public void nextAInt(int[] a,int off,int len){
      for(int i=off;i<off+len;i++){
        a[i] = nextInt();
      }
    }
    public long[] nextALong(int n){
      long[] a = new long[n];
      nextALong(a,n);
      return a;
    }
    public void nextALong(long[] a,int n){
      nextALong(a,0,n);
    }
    public void nextALong(long[] a,int off,int len){
      for(int i=off;i<off+len;i++){
        a[i] = nextLong();
      }
    }
    public double[] nextADouble(int n){
      double[] a = new double[n];
      nextADouble(a,n);
      return a;
    }
    public void nextADouble(double[] a,int n){
      nextADouble(a,0,n);
    }
    public void nextADouble(double[] a,int off,int len){
      for(int i=off;i<off+len;i++){
        a[i] = nextDouble();
      }
    }
    public List<Integer> nextLInt(int n){
      List<Integer> l = new ArrayList<>(n);
      for(int i=0;i<n;i++){
        l.add(sc.nextInt());
      }
      return l;
    }
    public List<Long> nextLLong(int n){
      List<Long> l = new ArrayList<>(n);
      for(int i=0;i<n;i++){
        l.add(sc.nextLong());
      }
      return l;
    }
    public List<Double> nextLDouble(int n){
      List<Double> l = new ArrayList<>(n);
      for(int i=0;i<n;i++){
        l.add(sc.nextDouble());
      }
      return l;
    }
  }
  
  static Scnr sc = new Scnr();
  static PrintWriter out = new PrintWriter(System.out);
  public static void main(String args[]){
    int n=sc.nextInt();
    int k=sc.nextInt();
    int[] ten={sc.nextInt(),sc.nextInt(),sc.nextInt()};
//System.out.println("ten\n"+Arrays.toString(ten));
    String t=sc.next();
    int ans=0;
    for(int i=0;i<k;i++){
      ans+=calc(t,n,i,k,ten);
    }
    System.out.println(ans);
  }
  static int calc(String g,int n,int ban,int st,int[] ten){
    int[][] dp=new int[3][(n+st-ban-1)/st];
    dp[0][0]=dp[1][0]=dp[2][0]=0;
    dp[tete(g.charAt(ban))][0]=ten[tete(g.charAt(ban))];
    for(int i=ban+st;i<n;i+=st){
      for(int j=0;j<3;j++){
        for(int k=0;k<3;k++){
          if(j==k){
            continue;
          }
//System.out.println(i+" "+j+" "+k);
          if(tete(g.charAt(i))==k){
            dp[k][i/st]=Math.max(dp[j][i/st-1]+ten[tete(g.charAt(i))],dp[k][i/st]);
          }else{
            dp[k][i/st]=Math.max(dp[j][i/st-1],dp[k][i/st]);
          }
        }
      }
    }
//System.out.println(Arrays.deepToString(dp));
    int res=0;
    for(int i=0;i<3;i++){
      res=Math.max(dp[i][dp[0].length-1],res);
    }
    return res;
  }
  static int tete(char c){
    if(c=='r'){
      return 2;
    }else if(c=='s'){
      return 0;
    }else if(c=='p'){
      return 1;    
    }
    return -2;
  }
}