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21 lines
322 B
Python
21 lines
322 B
Python
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lines = open('input').read().splitlines()
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arr = []
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_ = []
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for line in lines:
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if line == '':
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arr.append(_)
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_ = []
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else:
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_.append(list(line))
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arr.append(_)
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c = 0
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for group in arr:
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s = []
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for p in group:
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s = s+p
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# print(group)
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# print(s)
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c += len(set(s))
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print(c)
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