what do i need to modify in the code to make my desired output?

A B C D E D C B A 
A B C D   D C B A   
A B C       C B A     
A B           B A       
A               A

make this pattern using the code below:

n = int(input('\nEnter the No. of rows : '))
n=n//2+1

print('\n')
# this is a never ending loop
r=n
i=-1
s=chr(64+1)

while r>=n:
 c=j=1
 while c<=n*2-1:
  print(s if c<=r else ' ',end='')
  if c==n: j=-1
  c=c+j
 print()
 if r==1: i=1
 r=r+i
 if i==1 and r>n:
   break

previously i also made and succeded in making hollow diamond inscribed in rectangle so here it is:

n = int(input('\nEnter the No. of rows : '))
n=n//2+1
print('\n')

r=n
i=-1
while r<=n:
 c=j=1
 while c>=1:
  print('*' if c<=r else ' ',end='')
  if c==n: j=-1
  c=c+j
 print()
 if r==1: i=1
 r=r+i

print()

i have tried many ways but the code isnt working. i only want in this format so please understand and edit the code

i was expecting this:

A B C D E D C B A 
A B C D   D C B A   
A B C       C B A     
A B           B A       
A               A

but i am unable to make this.