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  1. Prepare
  2. Regex
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  4. Alien Username
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Alien Username

  • 21A31A05J1
     + 0 comments

    here is my reg expression

    import re
pattern = "^((_|\.)[0-9]+[a-zA-Z]*_?)$"

for _ in range(int(input())) :
    string = input()
    if re.search(pattern ,string) :
        print("VALID")
    else:
        print("INVALID")