package com.company;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class Umang {

    public static void main(String[] args) {
        String x = "1st Mar 1984";
        String[] arr = {"1st Mar 1984", "2nd Feb 2013", "4th Apr 1990"};
        List<String> dates = Arrays.asList(arr);
        List<String> outPutDates = reformatDate(dates);
        for (String s : outPutDates) {
            System.out.println(s);
        }
    }

    public static List<String> reformatDate(List<String> dates) {
        // Write your code here
        ArrayList<String> ans = new ArrayList<>();
        for (int i = 0; i < dates.size(); i++) {
            String dt = "";
            String[] part = dates.get(i).split(" ");
            dt += part[2] + "-";
            dt += getMonth(part[1]);
            dt += "-";
            dt += part[0].substring(0, part[0].length() - 2).length() < 2 ? "0" + part[0].substring(0, part[0].length() - 2) : part[0].substring(0, part[0].length() - 2);
            ans.add(dt);
        }
        return ans;
    }

    public static String getMonth(String mon) {
        switch (mon.toLowerCase()) {
            case "jan":
                return "01";
            case "feb":
                return "02";
            case "mar":
                return "03";
            case "apr":
                return "04";
            case "may":
                return "05";
            case "jun":
                return "06";
            case "jul":
                return "07";
            case "aug":
                return "08";
            case "sep":
                return "09";
            case "oct":
                return "10";
            case "nov":
                return "11";
            case "dec":
                return "12";
            default:
                return "";
        }

    }
}