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 Java (OpenJDK 11.0.6) (judge verdict: Accepted)

import java.util.*;

public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);

        int n = sc.nextInt();
        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = sc.nextInt();

        int[] res = new int[n];
        int[] in = new int[n];
        for(int i=0; i<n; i++) {
            String s = sc.next();
            if(s.equals("AB")) {
                in[i] = 2;
            } else if(s.equals("AC")) {
                in[i] = 1;
            }
        }
        boolean success = true;

        for(int i=0; i<n; i++) {
            if(a > 0 && b > 0 && c > 0) {
                go(i, a, b, c, in, res, n);
                break;
            }
            if(in[i] == 0) {
                if(b == 0 && c == 0) {
                    success = false;
                    break;
                }
                if(b == 0) {
                    res[i] = 1;
                    b++;
                    c--;
                    continue;
                }
                if(c == 0) {
                    res[i] = 2;
                    b--;
                    c++;
                    continue;
                }
                if(b == 1 && c == 1) {
                    if(i == n-1) {
                        res[i] = 1;
                        break;
                    }
                    if(in[i+1] == 0 || in[i+1] == 2) {
                        res[i] = 1;
                        b++;
                        c--;
                    } else {
                        res[i] = 2;
                        b--;
                        c++;
                    }
                    continue;
                }
                if(b < c) {
                    res[i] = 1;
                    b++;
                    c--;
                } else {
                    res[i] = 2;
                    b--;
                    c++;
                }
            } else if (in[i] == 1) {
                if(a == 0 && c == 0) {
                    success = false;
                    break;
                }
                if(a == 0) {
                    res[i] = 0;
                    a++;
                    c--;
                    continue;
                }
                if(c == 0) {
                    res[i] = 2;
                    a--;
                    c++;
                    continue;
                }
                if(a == 1 && c == 1) {
                    if(i == n-1) {
                        res[i] = 0;
                        break;
                    }
                    if(in[i+1] == 1 || in[i+1] == 2) {
                        res[i] = 0;
                        a++;
                        c--;
                    } else {
                        res[i] = 2;
                        a--;
                        c++;
                    }
                    continue;
                }
                if(a < c) {
                    res[i] = 0;
                    a++;
                    c--;
                } else {
                    res[i] = 2;
                    a--;
                    c++;
                }
            } else {
                if(a == 0 && b == 0) {
                    success = false;
                    break;
                }
                if(a == 0) {
                    res[i] = 0;
                    a++;
                    b--;
                    continue;
                }
                if(b == 0) {
                    res[i] = 1;
                    a--;
                    b++;
                    continue;
                }
                if(a == 1 && b == 1) {
                    if(i == n-1) {
                        res[i] = 0;
                        break;
                    }
                    if(in[i+1] == 2 || in[i+1] == 1) {
                        res[i] = 0;
                        a++;
                        b--;
                    } else {
                        res[i] = 1;
                        a--;
                        b++;
                    }
                    continue;
                }
                if(a < b) {
                    res[i] = 0;
                    a++;
                    b--;
                } else {
                    res[i] = 1;
                    a--;
                    b++;
                }
            }
        }

        if(success) {
            System.out.println("Yes");
            for(int i=0; i<n; i++) {
                System.out.println((char)('A' + res[i]));
            }
        } else {
            System.out.println("No");
        }
    }

    static void go(int pos, int a, int b, int c, int[] in, int[] res, int n) {
        int[] count = new int[3];
        for(int i=pos; i<n; i++) {
            if(in[i] == 0) {
                if(count[0] %2 == 0) {
                    res[i] = 1;
                } else {
                    res[i] = 2;
                }
            } else if(in[i] == 1) {
                if(count[1] %2 == 0) {
                    res[i] = 2;
                } else {
                    res[i] = 0;
                }
            } else {
                if(count[2] %2 == 0) {
                    res[i] = 0;
                } else {
                    res[i] = 1;
                }
            }
            count[in[i]]++;
        }
    }
}