#include <iostream>
#include <string>

using namespace std;

int find(string S, string A[], int size)
{ for (int i = 0; i < size; i += 1)
    if (S == A[i])
      return i;
  return -1; }

void remove(int P, string A[], int & size)
{ if (P < 0 || P >= size)
    return;
  for (int i = P; i < size - 1; i += 1)
    A[i] = A[i + 1];
  size -= 1; }

void filter(string A[], int & lenA, string B[], int lenB)
{ for (int i = 0; i < lenB; i += 1)
  { int P = find(B[i], A, lenA);
    if (P > 0)
      remove(P, A, lenA); } }