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 static System.Console;
using static System.Math;

namespace F_ABC166
{
    class MainClass
    {

        static int[] s;

        public static void Main(string[] args)
        {
            s = Array.ConvertAll(ReadLine().Split().ToArray(), int.Parse);
            int n = s[0];
            long a = s[1];
            long b = s[2];
            long c = s[3];
            var abcl = new List<string>();
            if (a + b + c == 0)
            {
                WriteLine("No");
                return;
            }
            else if (a + b + c == 1)
            {
                for (int i = 0; i < s[0]; i++)
                {
                    string abc = ReadLine();
                    if (abc == "AB")
                    {
                        if (a == 0 && b == 0)
                        {
                            WriteLine("No");
                            return;
                        }
                        else if (a == 0)
                        {
                            a++;
                            b--;
                            abcl.Add("A");
                        }
                        else
                        {
                            a--;
                            b++;
                            abcl.Add("B");
                        }
                    }
                    else if (abc == "BC")
                    {
                        if (b == 0 && c == 0)
                        {
                            WriteLine("No");
                            return;
                        }
                        else if (b == 0)
                        {
                            b++;
                            c--;
                            abcl.Add("B");
                        }
                        else
                        {
                            b--;
                            c++;
                            abcl.Add("C");
                        }
                    }
                    else
                    {
                        if (a == 0 && c == 0)
                        {
                            WriteLine("No");
                            return;
                        }
                        else if (a == 0)
                        {
                            a++;
                            c--;
                            abcl.Add("A");
                        }
                        else
                        {
                            a--;
                            c++;
                            abcl.Add("C");
                        }
                    }
                }
            }
            else
            {
                bool nxtflg = false;
                string abcnxt = "";
                for (int i = 0; i < s[0]; i++)
                {
                    
                    string abc = "";
                    if (nxtflg)
                    {
                        abc = abcnxt;
                        nxtflg = false;
                    }
                    else
                    {
                        abc = ReadLine();
                    }
                    // WriteLine("i : {0}  abc : {1} ",i,abc);
                    if (abc == "AB")
                    {
                        if (a == 0 && b == 0)
                        {
                            WriteLine("No");
                            return;
                        }
                        else if (a == 0)
                        {
                            a++;
                            b--;
                            abcl.Add("A");
                        }
                        else if (b == 0)
                        {
                            a--;
                            b++;
                            abcl.Add("B");
                        }
                        else
                        {
                            if (i == s[0] - 1)
                            {
                                a++;
                                b--;
                                abcl.Add("A");
                            }
                            else
                            {
                                abcnxt = ReadLine();
                                nxtflg = true;
                                if (abcnxt == "AC")
                                {
                                    a++;
                                    b--;
                                    abcl.Add("A");
                                }
                                else if (abcnxt == "BC")
                                {
                                    a--;
                                    b++;
                                    abcl.Add("B");
                                }
                                else
                                {
                                    a++;
                                    b--;
                                    abcl.Add("A");
                                }
                            }
                        }
                    }
                    else if (abc == "BC")
                    {
                        if (b == 0 && c == 0)
                        {
                            WriteLine("No");
                            return;
                        }
                        else if (b == 0)
                        {
                            b++;
                            c--;
                            abcl.Add("B");
                        }
                        else if (c == 0)
                        {
                            b--;
                            c++;
                            abcl.Add("C");
                        }
                        else
                        {
                            if (i == s[0] - 1)
                            {
                                b++;
                                c--;
                                abcl.Add("B");
                            }
                            else
                            {
                                abcnxt = ReadLine();
                                nxtflg = true;
                                if (abcnxt == "AC")
                                {
                                    c++;
                                    b--;
                                    abcl.Add("C");
                                }
                                else if (abcnxt == "BC")
                                {
                                    c--;
                                    b++;
                                    abcl.Add("B");
                                }
                                else
                                {
                                    c--;
                                    b++;
                                    abcl.Add("B");
                                }
                            }
                        }
                    }
                    else
                    {
                        if (a == 0 && c == 0)
                        {
                            WriteLine("No");
                            return;
                        }
                        else if (a == 0)
                        {
                            a++;
                            c--;
                            abcl.Add("A");
                        }
                        else if (c == 0)
                        {
                            a--;
                            c++;
                            abcl.Add("C");
                        }
                        else
                        {
                            if (i == s[0] - 1)
                            {
                                a++;
                                c--;
                                abcl.Add("A");
                            }
                            else
                            {
                                abcnxt = ReadLine();
                                nxtflg = true;
                                if (abcnxt == "AC")
                                {
                                    c++;
                                    a--;
                                    abcl.Add("C");
                                }
                                else if (abcnxt == "BC")
                                {
                                    a--;
                                    c++;
                                    abcl.Add("C");
                                }
                                else
                                {
                                    a++;
                                    c--;
                                    abcl.Add("A");
                                }
                            }
                        }
                    }
                }

            }
            WriteLine("Yes");
            foreach (string item in abcl)
            {
                WriteLine(item);
            }

        }
    }
}