Solution to Challenge "Conference Registration Assistant"

public class ConferenceRegistrationAssistant {

  public int getLineNumberFor(String lastName) {
    int lineNumber = 0;
    if (lastName.charAt(0) >= 'A' && lastName.charAt(0) <= 'M') {
      lineNumber = 1;
    } else {
      lineNumber = 2;
    } return lineNumber;
  }

}