When I test the code with "Run" is works, but fails when I verify.
package com.codegym.task.task08.task0828;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
/*
Month number
*/
public class Solution {
public static void main(String[] args) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
int ioMonthIndex = Integer.parseInt(reader.readLine()) - 1;
ArrayList<String> months = new ArrayList<String>();
months.add("January");
months.add("February");
months.add("March");
months.add("April");
months.add("May");
months.add("June");
months.add("July");
months.add("August");
months.add("September");
months.add("October");
months.add("November");
months.add("December");
System.out.println(months.get(ioMonthIndex) + " is month " + (ioMonthIndex + 1));
}
}