public static String convert1(String input) {
        String arrow = " ==> ";
        StringBuilder sb = new StringBuilder();
        String input2 = input.replace("Login;Name;Email", "");

        Pattern p = Pattern.compile("(?mU)^\\w+;");
        Matcher m = p.matcher(input2);

        Pattern p2 = Pattern.compile("(?mU)\\w+@\\w+\\.\\w+");
        Matcher m2 = p2.matcher(input2);

        while(m.find() | m2.find()) {
            sb.append(input2.substring(m.start(),m.end() - 1)).append(arrow);
            sb.append(input2.substring(m2.start(),m2.end())).append(System.lineSeparator());
        }
        return sb.toString();
    }

    public static String convert2(String input) {
        StringBuilder sb = new StringBuilder();
        String input2 = input.replace("Login;Name;Email", "");

        Pattern p = Pattern.compile("(?mU);\\w+\\s+\\w+;");
        Matcher m = p.matcher(input2);

        Pattern p2 = Pattern.compile("(?mU)\\w+@\\w+\\.\\w+");
        Matcher m2 = p2.matcher(input2);

        while(m.find() | m2.find()) {
            sb.append(input2.substring(m.start() + 1,m.end() - 1)).append(" (email: ");
            sb.append(input2.substring(m2.start(),m2.end())).append(")").append(System.lineSeparator());
        }

        return sb.toString();
    }

    public static String convert3(String input) {
        String arrow = " ==> ";
        String temp = "";
        StringBuilder sb = new StringBuilder();
        String input2 = input.replace("Login;Name;Email", "");

        Pattern p = Pattern.compile("(?mU)@.+");
        Matcher m = p.matcher(input2);

        Pattern p2 = Pattern.compile("(?mU)^\\w+;");
        Matcher m2 = p2.matcher(input2);

        Pattern p3 = Pattern.compile("(?mU)\\w+@\\w+\\.\\w+");
        Matcher m3 = p3.matcher(input2);

        while(m.find()) {
            temp = input2.substring(m.start() + 1,m.end());
            if(!sb.toString().contains(temp)) {
                sb.append(temp).append(arrow);
                while(m2.find() | m3.find()){
                    if(input2.substring(m3.start(),m3.end()).contains(temp)) {
                        sb.append(input2.substring(m2.start(),m2.end() - 1)).append(", ");
                    }
                }
                m2.reset();
                m3.reset();
                sb.replace(sb.length() - 2, sb.length(), "").append(System.lineSeparator());
            }


        }

        return sb.toString();
    }