printTextPerRoles#2

        StringBuilder sb = new StringBuilder();
        for (String role : roles) {
            sb.append(role).append(":\n");
            for (int i = 0; i < textLines.length; i++) {
                if (textLines[i].startsWith(role + ":")) {
                    sb.append((i + 1)).append(")").append(textLines[i].substring(role.length() + 1)).append("\n");
                }
            }
            sb.append("\n");
        }
        return sb.toString();