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# (Mono-mcs 6.8.0.105) (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using static Assistant.Input;
using static Assistant.Debug;
using System.Linq;
using Assistant;
using System.Text;

namespace ABC166F
{
    class Program
    {
        static void Main(string[] args)
        {
            var N = RInt;
            var A = RInt;
            var B = RInt;
            var C = RInt;

            string[] s = new string[N + 1];
            for (int i = 0; i < N; i++)
            {
                s[i] = RString;
            }

            bool can = true;
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < N; i++)
            {
                if (s[i] == "AB")
                {
                    if (A == 0 && B == 0)
                    {
                        can = false;
                        break;
                    }
                    if (A > B)
                    {
                        A--; B++;
                        sb.AppendLine("B");
                    }
                    else if (B > A)
                    {
                        B--; A++;
                        sb.AppendLine("A");
                    }
                    else
                    {
                        if (s[i + 1] == "AC" || A == 0) { A++; B--; sb.AppendLine("A"); }
                        else { A--; B++; sb.AppendLine("B"); }
                    }
                }
                else if (s[i] == "BC")
                {
                    if (B == 0 && C == 0)
                    {
                        can = false;
                        break;
                    }
                    if (B > C)
                    {
                        B--; C++;
                        sb.AppendLine("C");
                    }
                    else if (C > B)
                    {
                        C--; B++;
                        sb.AppendLine("B");
                    }
                    else
                    {
                        if (s[i + 1] == "AB" || B == 0) { B++; C--; sb.AppendLine("B"); }
                        else { B--; C++; sb.AppendLine("C"); }
                    }
                }
                else
                {
                    if (A == 0 && C == 0)
                    {
                        can = false;
                        break;
                    }
                    if (A > C)
                    {
                        A--; C++;
                        sb.AppendLine("C");
                    }
                    else if (C > A)
                    {
                        C--; A++;
                        sb.AppendLine("A");
                    }
                    else
                    {
                        if (s[i + 1] == "AB" || A == 0) { A++; C--; sb.AppendLine("A"); }
                        else { A--; C++; sb.AppendLine("C"); }
                    }
                }

            }

            if (!can) Console.WriteLine("No");
            else
            {
                Console.WriteLine("Yes");
                Console.WriteLine(sb);
            }
        }


    }


}

namespace Assistant
{
    static class Input
    {
        static List<string> line = new List<string>();
        static int index = 0;
        static String RNext()
        {
            if (line.Count <= index) line.AddRange(Console.ReadLine().Split());
            return line[index++];
        }
        public static int RInt => int.Parse(RNext());
        public static long RLong => long.Parse(RNext());
        public static int[] RInts => Console.ReadLine().Split().Select(int.Parse).ToArray();
        public static long[] RLongs => Console.ReadLine().Split().Select(long.Parse).ToArray();
        public static string RString => RNext();
        //以下未テスト
        public static int[] RIntsC(int c) => Enumerable.Repeat(0, c).Select(x => int.Parse(RNext())).ToArray();
        public static long[] RLongsC(int c) => Enumerable.Repeat(0, c).Select(x => long.Parse(RNext())).ToArray();
        public static char[][] RMap(int h) => Enumerable.Repeat(0, h).Select(x => Console.ReadLine().ToCharArray()).ToArray();
    }

    static class Debug
    {
        static public void Draw2D(int[,] map, int mode = 1)
        {
#if DEBUG
            int W = map.GetLength(0);
            int H = map.GetLength(1);

            int[,] map2 = new int[W + 1, H + 1];
            for (int i = 0; i < W + 1; i++)
            {
                for (int j = 0; j < H + 1; j++)
                {
                    if (i == 0 && j == 0) map2[i, j] = 0;
                    else if (i == 0) map2[i, j] = j - 1;
                    else if (j == 0) map2[i, j] = i - 1;
                    else map2[i, j] = map[i - 1, j - 1];
                }
            }

            for (int i = 0; i < W + 1; i++)
            {
                for (int j = 0; j < H + 1; j++)
                {
                    if (mode == 0) Console.Write(map2[i, j] % 10);
                    if (mode == 1) Console.Write(map2[i, j] + " ");
                }
                Console.WriteLine();
            }
            Console.WriteLine();
#endif
        }

        public static void Draw1D(int[] array, int mode = 0)
        {
#if DEBUG
            Console.WriteLine(string.Join(" ", array));
#endif
        }
    }
}