#include<bits/stdc++.h> using namespace std; int main(){ int n,k,r,s,c,sum=0; char a[25]; cin>>n>>k>>r>>s>>c; for(int i=1;i<=n;i++){ cin>>a[i]; } int n1=1,n2=1,n3=1; for(int i=1;i<=n;i++){ if(a[i]==a[i-k]&&a[i]=='r'){ n1++; } if(a[i]==a[i-k]&&a[i]=='s'){ n2++; } if(a[i]==a[i-k]&&a[i]=='c'){ n3++; }else if(a[i]=='r'&&n1%2==1){ sum+=c; }else if(a[i]=='s'&&n2%2==1){ sum+=r; }else if(a[i]=='c'&&n3%2==1){ sum+=s; } } cout<<sum; return 0; }