#include<stdio.h>
#include<string.h>
int main ()
{
    freopen("restante.in","r",stdin);
    freopen("restante.out","w",stdout);
    int n,i,k,m,x;
    scanf("%d",&n);
    char a[n][17],e;
    int b[n];
    gets(a[1]);
    for(i=1;i<=n;i++)
  {  gets(a[i]);
  m=1;x=strlen(a[i])-1;
  while(m)
{m=0;
          for(k=0;k<x;k++)
          {
                          if(a[i][k]>a[i][k+1])
                          {e=a[i][k];
                          a[i][k]=a[i][k+1];
                          a[i][k+1]=e;
                          m=1;
                          }
                          }
                          }}
          for(i=1;i<=n;i++)
          for(k=i+1;k<=n;k++)
          {
                             if(strstr(a[i],a[k])!=0)
                             b[i]=b[k]=1;
                             }m=0;
                             for(i=1;i<=n;i++)
                             if(b[i]!=1)
                             m++;
                             printf("%d\n",m);
                             return 0;
                             }