Is there any reason my code doesn't pass the tests? The output is fine.
Thanks
package com.codegym.task.task10.task1012;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
/*
Number of letters
*/
import java.util.*;
public class Solution {
public static void main(String[] args) throws Exception {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
// Alphabet
String abc = "abcdefghijklmnopqrstuvwxyz";
HashMap<Character,Integer> mapping = new HashMap<>();
char[] abcArray = abc.toCharArray();
for(char c : abcArray){
mapping.put(c,0);
}
ArrayList<Character> alphabet = new ArrayList<>();
for (char letter : abcArray) {
alphabet.add(letter);
}
// Read in strings
ArrayList<String> list = new ArrayList<>();
for (int i = 0; i < 10; i++) {
String s = reader.readLine();
list.add(s.toLowerCase());
}
for(String s : list) {
char[] charTable = s.toCharArray();
for(Character c : charTable) {
if(mapping.containsKey(c)) mapping.put(c, mapping.get(c)+1);
else mapping.put(c, 1);
}
}
for (Map.Entry<Character, Integer> entry : mapping.entrySet()) {
System.out.println(entry.getKey() + " " + entry.getValue());
}
}
}