@spsk_1313
your code is bad pasted. It should be like this:
n = int(input())for i in range(n):
s,t = input().split()
s,t = int(s),int(t)
for i in range(s):
for j in range(t):
if (i+j) % 2 == 0:
print("*",end="")
else:
print(".",end="")
print("\n")
or you can use
How to use Ideone.com
like this: https://ideone.com/9dwL8R
==
BTW
@spsk_1313
Maybe you want my contact number too? … and my bank account number, to stay in much better touch with me!? 