Problem:
Score : 600 points

Problem Statement

There is a game that involves three variables, denoted A, B, and C.

As the game progresses, there will be N events where you are asked to make a choice.
Each of these choices is represented by a string s_i. If s_i is AB, you must add 1 to A or B then subtract 1 from the other; if s_i is AC, you must add 1 to A or C then subtract 1 from the other; if s_i is BC, you must add 1 to B or C then subtract 1 from the other.

After each choice, none of A, B, and C should be negative.

Determine whether it is possible to make N choices under this condition. If it is possible, also give one such way to make the choices.

Constraints

1 \leq N \leq 10^5

0 \leq A,B,C \leq 10^9

N, A, B, C are integers.

s_i is AB, AC, or BC.

Input

Input is given from Standard Input in the following format:

N A B C
s_1
s_2
:
s_N

Output

If it is possible to make N choices under the condition, print Yes; otherwise, print No.

Also, in the former case, show one such way to make the choices in the subsequent N lines. The (i+1)-th line should contain the name of the variable (A, B, or C) to which you add 1 in the i-th choice.

Sample Input 1

2 1 3 0
AB
AC

Sample Output 1

Yes
A
C

You can successfully make two choices, as follows:

In the first choice, add 1 to A and subtract 1 from B. A becomes 2, and B becomes 2.

In the second choice, add 1 to C and subtract 1 from A. C becomes 1, and A becomes 1.

Sample Input 2

3 1 0 0
AB
BC
AB

Sample Output 2

No

Sample Input 3

1 0 9 0
AC

Sample Output 3

No

Sample Input 4

8 6 9 1
AC
BC
AB
BC
AC
BC
AB
AB

Sample Output 4

Yes
C
B
B
C
C
B
A
A

Solution in C# (.NET Core 3.1.201) (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using Library;
using static Library.Input;

namespace AtCoderTemplate
{
    class ProgramF
    {
        static void Main()
        {
            int n = NextInt;
            var abc = new int[3] {NextInt, NextInt, NextInt};
            var s = Enumerable.Range(0, n).Select(_ => Line).ToArray();
            var stack = new List<char>();

            if (s[0].All(c => abc[c - 'A'] == 0) && abc.Count(x => x == 0) >= 2)
            {
                System.Console.WriteLine("No");
                return;
            }

            for (int i = 0; i < n; i++)
            {
                // 両方とも0
                if (abc[s[i][0] - 'A'] == 0 && abc[s[i][1] - 'A'] == 0)
                {
                    System.Console.WriteLine("No");
                    return;
                }

                // s[i][0]が大きい
                if (abc[s[i][0] - 'A'] > abc[s[i][1] - 'A'])
                {
                    abc[s[i][0] - 'A']--;
                    abc[s[i][1] - 'A']++;
                    stack.Add(s[i][1]);
                }

                // s[i][1]が大きい
                else if (abc[s[i][0] - 'A'] < abc[s[i][1] - 'A'])
                {
                    abc[s[i][0] - 'A']++;
                    abc[s[i][1] - 'A']--;
                    stack.Add(s[i][0]);
                }

                // 数が同じ
                else if (abc[s[i][0] - 'A'] == abc[s[i][1] - 'A'])
                {
                    var intersect = i + 1 < n ? s[i].Intersect(s[i + 1]).ElementAt(0) : s[i][0];
                    abc[intersect - 'A']++;
                    abc[s[i].First(c => c != intersect) - 'A']--;
                    stack.Add(intersect);
                }
            }

            System.Console.WriteLine("Yes");
            System.Console.WriteLine(string.Join("\n", stack));
        }
    }
}

namespace Library
{
    class Input
    {
        static IEnumerator<string> enumerator = new string[] { }.AsEnumerable().GetEnumerator();

        public static string Line => Console.ReadLine();

        public static string[] StrArr => Line.Split(' ');

        public static int NextInt => int.Parse(NextWord());

        public static long NextLong => long.Parse(NextWord());

        public static List<int> IntList => StrArr.Select(int.Parse).ToList();

        public static List<long> LongList => StrArr.Select(long.Parse).ToList();

        public static IEnumerable<long[]> TakeLine(int N)
        {
            return Enumerable.Repeat(0, N).Select(_ => Console.ReadLine().Split(' ').Select(long.Parse).ToArray());
        }

        public static string NextWord()
        {
            while (!enumerator.MoveNext())
            {
                enumerator = StrArr.AsEnumerable().GetEnumerator();
            }
            return enumerator.Current;
        }
    }
}