Holes in the text problem(Please tell me why this code is not working)

#include<iostream>
#include<iomanip>
#include<string.h>

int main()
{  
int i,len=0,count,test,j;
char a[101];
cin>>test;
for(j=1;j<=test;j++)
{

cin>>a;

while(a[len]!='\0')
    {

        len++;
    }
   count=0;


    for(i=0;i<len;i++)
    {
        if(a[i]=='A' || a[i]=='D' || a[i]=='P' || a[i]=='Q' || a[i]=='R' || a[i]=='O')
        count++;
        else 
        if(a[i]=='B')
        count=count+2;
    }
    cout<<count<<endl;
}
    return 0;

}