import java.util.List;

public class Namer {
    private String firstName;
    private String lastName;

    public Namer(String firstName, String lastName) {
        this.firstName = firstName;
        this.lastName = lastName;
    }

    public String getFirstName() {
        return firstName;
    }

    public String getLastName() {
        return lastName;
    }
}

public class NameParserSimple {
    public static Namer parseName(String name) {
        int commaIdx = name.indexOf(',');
        if (commaIdx != -1) {
            return new Namer(name.substring(commaIdx + 1).trim(), name.substring(0, commaIdx).trim());
        }

        int spaceIdx = name.indexOf(' ');
        if (spaceIdx != -1) {
            return new Namer(name.substring(0, spaceIdx).trim(), name.substring(spaceIdx + 1).trim());
        }

        return new Namer("", name);
    }
}

public class NameParserRegex {
    static List<String> nameFormats = { "\{0}, \{1}", "\{1} \{0}" };

    public static Namer parseName(String name) {
        for (format : nameFormats) {
            Namer namer = parseName(name, format);
            if (namer != null)
                return namer;
        }
        return new Namer("", name);
    }

    public static Namer parseName(String name, Regex nameFormat) {
        Match match = nameFormat.match(name);
        if (!match)
            return null;

        return new Namer(match.group(0), match.group(1));
    }
}

public class NameParserConfigurable {
    private List<String> nameFormats;

    public NameParser(List<String> nameFormats) {
        this.nameFormats = nameFormats;
    }

    public Namer parseName(String name) {
        for (format : nameFormats) {
            Namer namer = parseName(name, format);
            if (namer != null)
                return namer;
        }
        return new Namer("", name);
    }

    public static Namer parseName(String name, Regex nameFormat) {
        Match match = nameFormat.match(name);
        if (!match)
            return null;

        return new Namer(match.group(0), match.group(1));
    }
}