You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
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line = open("input.txt", "r").read()
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for i in range(len(line)):
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if len(set(line[i : i + 4])) == 4:
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print(i + 4)
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break
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