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N = input()
for riga in range(N):
for colonna in range(N):
somma = colonna + riga
resto = somma % 2
if resto == 1:
print ("X\t")
else:
print ("\t")
print ("\n")
# Hello World program in Python
n=input()
for riga in range(n):
for colonna in range(n):
somma=colonna+riga
resto=somma%2
if resto==1:
print("x\t")
else:
print("\t")
print("\n")