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import re
n = int(input())
for _ in range(n):
username = input()
pattern = r'^[.]\d{1,}[a-zA-Z]*[]?$'
if re.search(pattern,username):
print("VALID")
else:
print("INVALID")
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import re n = int(input()) for _ in range(n): username = input() pattern = r'^[.]\d{1,}[a-zA-Z]*[]?$' if re.search(pattern,username): print("VALID") else: print("INVALID")