package chelper;

import io.InputReader;
import io.OutputWriter;
import solutions.ChelperSolution;


public class A extends ChelperSolution {

  @Override
  public void solve(int testNumber, InputReader in, OutputWriter out) {
    super.solve(testNumber, in, out);
  }

  @Override
  public void solve(int testNumber) {
    String a = in.nextLine();
    String b = in.nextLine();

    int c = 0;
    for (char c1 : b.toCharArray()) {
      if (a.contains("" + c1)) {
        c++;
      }
    }

    out.println(c);
  }
}