#include "pch.h"
#include <iostream>
#include <fstream>
using namespace std;
int main()
{
	ifstream in("input.txt");
	ofstream out("output.txt");
	char x;
	int q = 0;
	while (in >> x && q != 8)
	{
		out << x;
		switch (q)
		{
		case 0:
			if (x == 'D')
				q = 1;
			else q = 8;
			break;
		case 1:
			if (x == 'B')
				q = 2;
			else q = 8;
			break;
		case 2:
			if (x == 'A')
				q = 3;
			else
				if (x == 'B' || x == 'C')
					q = 4;
				else
					if (x == 'D')
						q = 5;
					else q = 8;
			break;
		case 3:
			if (x == 'B')
				q = 5;
			else q = 8;
			break;
		case 4:
			if (x == 'E')
				q = 5;
			else q = 8;
			break;
		case 5:
			if (x == 'A')
				q = 6;
			else q = 8;
			break;
		case 6:
			if (x == 'E')
				q = 7;
			else
				if (x == 'A')
					q = 3;
				else
					if (x == 'B' || x == 'C')
						q = 4;
					else
						if (x == 'D')
							q = 5;
						else q = 8;
			break;
		case 7:
			if (x)
				q = 8;
			break;
		}
		out << "\t" << q << endl;
	}
	if (q == 7)
		cout << "Yes";
	else
		cout << "No";
	in.close();
	out.close();
}