#include<map>
#include<cstring>
#include<iostream>
#include<algorithm>

using namespace std;

int main(){
   
   unsigned long long num[100005]={0};
   unsigned long long color[100005]={0};
   unsigned long long score=0;
   int i=1,n,m;
   cin>>n>>m;
   for(int o=1;o<=n;o++){
      cin>>num[o];
   }
   num[0]=0;
   for(int o=1;o<=n;o++){
      cin>>color[o];
   }
   //处理
   for(i=1;i<=n;i++)
   {
         num[i]+=num[i-1]; 
         for(int j=i-2;j>=1;j--){
            if(color[j]==color[i]&&i!=j&&((i+j)%2==0)){
               score+=(i+j)*(num[i]-num[i-1]+num[j]-num[j-1]);
               score%=10007;
            }
         }
   }
   cout<<score;
   return 0;
}