#include <cstdio>
#include <cstring>
#include <iostream>
#include <algorithm>
using namespace std ;

const char *STR="AKIHABARA";
string s;

int main(){
	cin>>s;
	if (s=="AKIHABARA"||
		s=="KIHABARA" ||
		s=="AKIHBARA" ||
		s=="AKIHABRA" ||
		s=="AKIHABAR" ||
		s=="KIHBARA" ||
		s=="KIHABRA" ||
		s=="KIHABAR" ||
		s=="AKIHBRA" ||
		s=="AKIHBAR" ||
		s=="AKIHABR" ||
		s=="KIHBRA" ||
		s=="KIHBAR" ||
		s=="KIHABR" ||
		s=="AKIHBR" ||
		s=="KIHBR") puts("YES") ;
	else puts("NO");
	return 0 ;
}