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: Wrong Answer)

using System;
using System.Collections.Generic;
using System.Linq;
using static System.Console;
using static System.Math;

class MainClass : Scanner
{
    static void Main()
    {
        var (N, A, B, C) = ReadTuple<int,int,int,int>();
        string[] S = new string[N];
        for (int i = 0; i < N; i++)
        {
            S[i] = RString();
        }
        if (A + B + C == 0) WriteLine("NO");
        else if (A + B + C == 1)
        {
            bool frag = true;
            var ans = new List<string>();
            int[] abc = new int[3] { A, B, C };
            for (int i = 0; i < N; i++)
            {
                var s = S[i];
                int inda = charToIndex(s[0]);
                int indb = charToIndex(s[1]);
                if (abc[inda] == 0 && abc[indb] == 0)
                {
                    frag = false; break;
                }
                else//swap
                {
                    (abc[inda], abc[indb]) = (abc[indb], abc[inda]);
                    if (abc[inda] == 1)
                    {
                        ans.Add(IndexToChar(inda).ToString());
                    }
                    else
                    {
                        ans.Add(IndexToChar(indb).ToString());
                    }
                }

            }
            if (frag)
            {
                WriteLine("Yes");
                WriteLine(string.Join(Environment.NewLine, ans));
            }
            else
            {
                WriteLine("No");
            }

        }
        else
        {
            bool frag = true;
            var ans = new List<string>();
            int[] abc = new int[3] { A, B, C };
            for (int i = 0; i < N; i++)
            {
                var s = S[i];
                int inda = charToIndex(s[0]);
                int indb = charToIndex(s[1]);
                if (abc[inda] == 0 && abc[indb] == 0)
                {
                    frag = false; break;
                }
                else if (abc[inda] == 1 && abc[indb] == 1)
                {
                    if (i == N - 1)
                    {
                        abc[inda]++;abc[indb]--;
                        ans.Add(IndexToChar(inda).ToString());
                    }
                    else
                    {
                        var ns = S[i + 1];
                        if (s == ns)
                        {
                            abc[inda]++;abc[indb]--;
                            ans.Add(IndexToChar(inda).ToString());
                        }
                        else
                        {
                            if (ns.Contains(s[0]))
                            {
                                abc[inda]++; abc[indb]--;
                                ans.Add(IndexToChar(inda).ToString());
                            }
                            else
                            {
                                abc[inda]--; abc[indb]++;
                                ans.Add(IndexToChar(indb).ToString());
                            }
                        }
                    }
                }
                else
                {
                    if (abc[inda] >= abc[indb])
                    {
                        abc[inda]--;abc[indb]++;
                        ans.Add(IndexToChar(indb).ToString());
                    }
                    else
                    {
                        abc[inda]++; abc[indb]--;
                        ans.Add(IndexToChar(inda).ToString());
                    }
                }
                
            }
            if (frag)
            {
                WriteLine("Yes");
                WriteLine(string.Join(Environment.NewLine,ans));

            }
            else
            {
                WriteLine("No");
            }
        }
    }
    static int charToIndex(char a)
    {
        return a - 'A';
    }
    static char IndexToChar(int b)
    {
        return (char)('A' + b);
    }
}



class Scanner
{
    public static string RString() => Console.ReadLine();
    public static int RInt() => ReadTuple<int>();
    public static long RLong() => ReadTuple<long>();
    public static double RDouble() => ReadTuple<double>();

    public static string[] RStrings() => Console.ReadLine().Split();
    public static int[] RInts() => Array.ConvertAll(Console.ReadLine().Split(), int.Parse);
    public static long[] RLongs() => Array.ConvertAll(Console.ReadLine().Split(), long.Parse);
    public static double[] RDoubles() => Array.ConvertAll(Console.ReadLine().Split(), double.Parse);
    public static int[] RInts(Func<string, int> func) => Console.ReadLine().Split().Select(func).ToArray();
    public static long[] RLongs(Func<string, long> func) => Console.ReadLine().Split().Select(func).ToArray();
    public static double[] RDoubles(Func<string, double> func) => Console.ReadLine().Split().Select(func).ToArray();
    //public static string[] RStrings(Func<string, string> func) => Console.ReadLine().Split().Select(func).ToArray();

    public static T1 ReadTuple<T1>()
    {
        var r = RString();
        var r1 = (T1)Convert.ChangeType(r, typeof(T1));
        return r1;
    }
    public static (T1, T2) ReadTuple<T1, T2>()
    {
        var r = RStrings();
        var r1 = (T1)Convert.ChangeType(r[0], typeof(T1));
        var r2 = (T2)Convert.ChangeType(r[1], typeof(T2));
        return (r1, r2);
    }
    public static (T1, T2, T3) ReadTuple<T1, T2, T3>()
    {
        var r = RStrings();
        var r1 = (T1)Convert.ChangeType(r[0], typeof(T1));
        var r2 = (T2)Convert.ChangeType(r[1], typeof(T2));
        var r3 = (T3)Convert.ChangeType(r[2], typeof(T3));
        return (r1, r2, r3);
    }
    public static (T1, T2, T3, T4) ReadTuple<T1, T2, T3, T4>()
    {
        var r = RStrings();
        var r1 = (T1)Convert.ChangeType(r[0], typeof(T1));
        var r2 = (T2)Convert.ChangeType(r[1], typeof(T2));
        var r3 = (T3)Convert.ChangeType(r[2], typeof(T3));
        var r4 = (T4)Convert.ChangeType(r[3], typeof(T4));
        return (r1, r2, r3, r4);
    }
}