#include<bits/stdc++.h>
using namespace std;
int a[300],b[300],ca[300],cb[300];
int aa[20],bb[20];
bool ia[300],ib[300];
int t,n;
int main(){
    freopen("numlg.in","r",stdin);
    freopen("numlg.out","w",stdout);
    cin>>t;
    for(int tt=1;tt<=t;tt++){
       cin>>n;
       int ans=0;
       memset(ia,0,sizeof(ia));
       memset(ib,0,sizeof(ib));
       memset(aa,0,sizeof(aa));
       memset(bb,0,sizeof(bb));
       memset(a,0,sizeof(a));
       memset(b,0,sizeof(b));
       memset(ca,0,sizeof(ca));
       memset(cb,0,sizeof(cb));
       for(int i=1;i<=n;i++){
           cin>>a[i];
           int x=a[i];
           while(x>0){
               x/=10;
               ca[i]++;
           }
       }
       for(int i=1;i<=n;i++){
           cin>>b[i];
           int x=b[i];
           while(x>0){
               x/=10;
               cb[i]++;
           }
       }
       for(int i=1;i<=n;i++){
           for(int j=1;j<=n;j++){
               if(a[i]==b[j]){
                   if(ia[i]==0&&ib[j]==0){
                       ia[i]=1;
                       ib[j]=1;
                       continue;
                   }
               }
           }
       }
       for(int i=1;i<=n;i++){
           if(ca[i]==1)aa[a[i]]++;
           else if(ia[i]==0){
               ans++;
               aa[ca[i]]++;
           }
           if(cb[i]==1)bb[b[i]]++;
           else if(ib[i]==0){
               ans++;
               bb[cb[i]]++;
           }
       }
       for(int i=2;i<=9;i++){
           int k=0;
           if(aa[i]!=bb[i]){
               ans+=abs(aa[i]-bb[i]);
           }
       }
       cout<<ans<<endl;
    }
    return 0;
}