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++ (GCC 9.2.1) (judge verdict: Accepted)

//#include<bits/stdc++.h>
//using namespace std;
//#define mem(a) memset(a,0,sizeof(a))
//#define dbg(x) cout<<#x<<" = "<<x<<endl
//#define ll long long
//int main()
//{
//	int na,nb,nc,n,i;
//	vector<char>C;
//	char c[100010][3];
//	cin>>n>>na>>nb>>nc;
//	//dbg(n);
//	for(i=0;i<n;i++)scanf("%s",c[i]);
//	for(i=0;i<n;i++)
//	{
//		if(!strcmp(c[i],"AB"))//AB
//		{
//			//cout<<"AB\n";//*****************
//			if(na<nb)na++,nb--,C.push_back('A');
//			else if(na>nb)na--,nb++,C.push_back('B');
//			else
//			{
//				if(c[i+1][0]=='A')na++,nb--,C.push_back('A');
//				else na--,nb++,C.push_back('B');
//			}
//		}
//		else if(!strcmp(c[i],"AC"))//AC
//		{
//			//cout<<"AC\n";//*****************
//			if(na<nc)na++,nc--,C.push_back('A');
//			else if(na>nc)na--,nc++,C.push_back('C');
//			else
//			{
//				if(c[i+1][0]=='A')na++,nc--,C.push_back('A');
//				else na--,nc++,C.push_back('C');
//			}
//		}
//		else//BC
//		{
//			//cout<<"BC\n";//*****************
//			if(nb<nc)nb++,nc--,C.push_back('B');
//			else if(nb>nc)nb--,nc++,C.push_back('C');
//			else
//			{
//				if(c[i+1][1]=='C')nb--,nc++,C.push_back('C');
//				else nb++,nc--,C.push_back('B');
//			}
//		}
//	}
//	if(na<0||nb<0||nc<0){cout<<"No";return 0;}
//	cout<<"Yes\n";
//	for(vector<char>::iterator it=C.begin();it!=C.end();it++)printf("%c\n",*it);
//	return 0;
//}
#include<bits/stdc++.h>
using namespace std;
const int N=1e5+7;
char s[N][5];
int main(){
    int n,na,nb,nc;
    cin>>n>>na>>nb>>nc;
    for(int i=1;i<=n;i++)scanf("%s",s[i]+1); 
    vector<char>C;
    for(int i=1;i<=n;i++)
    {    
		if(s[i][1]=='A'&&s[i][2]=='B')
		{
            if(na>nb)na--,nb++,C.push_back('B');
            else if(na<nb)na++,nb--,C.push_back('A');
            else 
			{
                if(s[i+1][1]=='A')na++,nb--,C.push_back('A');
                else na--,nb++,C.push_back('B');
            }
        }
        else if(s[i][1]=='A'&&s[i][2]=='C')
		{
            if(na>nc)na--,nc++,C.push_back('C');
            else if(na<nc)na++,nc--,C.push_back('A'); 
            else 
			{
                if(s[i+1][1]=='A')na++,nc--,C.push_back('A');
                else na--,nc++,C.push_back('C');
            }
        }
        else 
		{
            if(nb>nc)nb--,nc++,C.push_back('C');
            else if(nb<nc)nb++,nc--,C.push_back('B'); 
            else 
			{
                if(s[i+1][2]=='C')nb--,nc++,C.push_back('C');
                else nb++,nc--,C.push_back('B');
            }
        } 
        if(na<0||nb<0||nc<0) return cout<<"No"<<endl,0;
    }
    puts("Yes");
    for(vector<char>::iterator it=C.begin();it!=C.end();it++)
    {
    	printf("%c\n",*it);
	}
    return 0;
}