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#include<iostream>
#include<cstdio>
#include<vector>
#include<algorithm>
#include<cstring>
using namespace std;

int par[30];


void make_set(int i)
{
     par[i] = i;
 }
 
int find(int r)
{

    if(par[r]==r) return r;
    else
    {
        return par[r] = find(par[r]);
        }
}
 
void Union(int a, int b)
{
     int u = find(a);
     int v = find(b);
     
     if(u==v) return;
     else{
          par[u] = v;
          }
 }

int main()
{
    
    int T,u,v,max,i,j,temp,res;
    char max_char;
    char edge[3];
    
    scanf("%d\n",&T);
    
    while(T--){
               
               
               while(1){
                   memset(edge,'\0',sizeof(edge));
                   gets(edge);
                   if(strlen(edge)==0) break;
                
                if(strlen(edge)==1){
                       max_char = edge[0];
                      
                   max = (int)max_char-64;
                   for(i=1; i<=max; i++)
                        make_set(i);
                    continue;
                       
                   }       
                         
                        
                 u = (int) edge[0] - 64;
                 v = (int) edge[1] - 64;
                 Union(u,v);
                   
             }
               sort(par+1,par+1+max);
               
               res = 0;
               
             
               for(i=1; i<max; i++){
                        if(find(par[i])!=find(par[i+1]))
                                res++;
               }
               
               printf("%d\n",res+1);

               if(T)
                    printf("\n");
               }
         
     return 0;
} 

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ACC god, al ham du llellah

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2

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AB
CE
DB
EC

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EC

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A

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removed after ac

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AB
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DF