Hi!
try:
amm = int(input())
except ValueError:
amm = 0
lines = []
perline = []

if amm > 0:
  for i in range (0, amm):
    lines.append(int(input()))
    perline.append(int(input()))
    
  for i in range(0, amm):
    asterisk = True
    for j in range(0, lines[i]):
      for g in range(0, perline[i]):
        if asterisk:
          print("*", end="")
          asterisk = False
        else:
          print(".", end="")
          asterisk = True
      print()
    print ()`

this is the code i use to finish the challenge in question title. I get EOF error, while locally i dont get it. Any clues?