def rows(letter):
list\_start = ['A','B','C','D','E','F','G','H','I','J', 'K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z']
row\_conf=[]
n = list\_start.index(letter)
for i in range(n+1):
if i == 0:
row\_conf.append(n\*' ' +'A' +n\*' ')
else:
row\_conf.append((n-i)\*' ' +list\_start[i]+(2\*i-1)\*' '+list\_start[i]+(n-i)\*' ')
if n > 0:
row\_c = row\_conf[-2::-1]
row\_conf += row\_c
return row\_conf