#include<bits/stdc++.h> using namespace std; int main(){ int n,k,r,s,c,sum=0; string t; int num1=1,num2=1,num3=1; char a[25]; cin>>n>>k>>r>>s>>c; for(int i=1;i<=n;i++){ cin>>a[i]; } for(int i=1;i<=n;i++){ if(a[i]==a[i-k]&&a[i]=='r') num1++; if(a[i]==a[i-k]&&a[i]=='s') num2++; if(a[i]==a[i-k]&&a[i]=='c') num3++; else if(a[i]=='r'&&num1%2==1) sum+=c; else if(a[i]=='s'&&num2%2==1) sum+=r; else if(a[i]=='c'&&num3%2==1) sum+=s; } cout<<sum; return 0; }