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.Linq;
using System.Collections.Generic;

namespace ConsoleApp1 {
    public class Class1 {
        static void Main(string[] args) {
            var X = Console.ReadLine().Trim().Split(' ').Select(x => long.Parse(x)).ToArray();
            var N = X[0];
            var A = X[1];
            var B = X[2];
            var C = X[3];
            var ans = new string[N];
            var com = new string[N];
            var boo = true;

            for(var i = 0; i < N; i++) {
                com[i] = Console.ReadLine();
            }

            for (var i = 0; i < N; i++) {
                if (!boo)
                    break;

                switch (com[i]) {
                    case "AB":
                        if (A == 0 && B == 0) {
                            if (i != 0 && C == 2) {
                                if(com[i - 1] == "AC") {
                                    A = 2;
                                    ans[i - 1] = "A";
                                }
                                if(com[i - 1] == "BC") {
                                    B = 2;
                                    ans[i - 1] = "B";
                                }
                                C = 0;
                                i--;
                                break;
                            }
                            boo = false;
                            break;
                        }
                        if (A >= B) {
                            A--;
                            B++;
                            ans[i] = "B";
                        } else {
                            A++;
                            B--;
                            ans[i] = "A";
                        }
                        break;
                    case "AC":
                        if (A == 0 && C == 0) {
                            if (i != 0 && B == 2) {
                                if (com[i - 1] == "AB") {
                                    A = 2;
                                    ans[i - 1] = "A";
                                }
                                if (com[i - 1] == "BC") {
                                    C = 2;
                                    ans[i - 1] = "C";
                                }
                                B = 0;
                                i--;
                                break;
                            }
                            boo = false;
                            break;
                        }
                        if (A >= C) {
                            A--;
                            C++;
                            ans[i] = "C";
                        } else {
                            A++;
                            C--;
                            ans[i] = "A";
                        }
                        break;
                    case "BC":
                        if (B == 0 && C == 0) {
                            if (i != 0 && A == 2) {
                                if (com[i - 1] == "AB") {
                                    B = 2;
                                    ans[i - 1] = "B";
                                }
                                if (com[i - 1] == "AC") {
                                    C = 2;
                                    ans[i - 1] = "C";
                                }
                                A = 0;
                                i--;
                                break;
                            }
                            boo = false;
                            break;
                        }
                        if (B >= C) {
                            B--;
                            C++;
                            ans[i] = "C";
                        } else {
                            B++;
                            C--;
                            ans[i] = "B";
                        }
                        break;
                }
            }
            if (boo) {
                Console.WriteLine("Yes");
                foreach (var tex in ans) {
                    Console.WriteLine(tex);
                }
            } else {
                Console.Write("No");
            }
            Console.Read();
        }
    }
}