#include<iostream>
#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n, k;
	int co=0;
	cin>>n;
	while(n--)
	{
	   string  s;
		cin>>s;
		int k ;
		k = s.length();
		for(int i =0;i<k;i++)
		{
			if(s[i]=='B')
			{
				co = co+1;
				
			}
		}
		if(k%2==0 && co==k/2)
		{
			cout<<"Yes ";
		}
		else{
			cout<<"no";
		}
		co=0;
	}
}