// Kontr 1.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <iostream>
using namespace std;

int _tmain(int argc, _TCHAR* argv[])
{
char in;
in = getchar();
int state = 1;
int value = 0;
while (in !=10) {

switch(state) {
case 1: if (in == '+' || in == '-')
state = 2;
else if (in == '0')
state = 3;
else
value = 1;
break;

case 2: if (in == '0')
state = 3;
else
value = 1;
break;

case 3: if (in == 'x')
state = 4;
else if (in == '0','1','2','3','4','5','6','7')
state = 5;
else
value = 1;
break;

case 4: if (in == '0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F')
state = 6;
else
value = 1;
break;

case 5: if (in == '0','1','2','3','4','5','6','7')
state = 5;
else if (in == '*')
state = 7;
else
value = 1;

break;

case 6: if (in == '0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F')
state = 6;
else if (in == '*')
state = 7;
else
value = 1;
break;
}

in = getchar();
}

if (value ==1 ) cout << "No"; else cout << "Yes";

return 0;
}