import java.util.*;
import java.lang.*;
import java.io.*;
 
class Inventory {
    static Map<String,Integer> bags = new HashMap<String,Integer>();
 
    public static void addInv(String itemName, Integer amount) {
        bags.put(itemName, amount);
 
        System.out.println("BAG UPDATE");
        for (String name : bags.keySet()) {
            System.out.println(name +"\t"+ bags.get(name));
        }
        System.out.println("\n");
    }
}
 
class Ideone
{
    public static void main (String[] args) throws java.lang.Exception
    {
        Inventory.addInv("Butts", 7);
        Inventory.addInv("Hotdogs", 3);
        Inventory.addInv("Butts", 42);
        Inventory.addInv("Potions", 1);
        Inventory.addInv("Poo", 183);
        Inventory.addInv("Hotdogs", 9);
    }
}

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