ppo
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@ -2,7 +2,7 @@ def is_paired(input_string):
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stack = []
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stack = []
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for char in input_string:
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for char in input_string:
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if char == '(' or char == '[]' or char == '{':
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if char == '(' or char == '[' or char == '{':
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stack.append(char)
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stack.append(char)
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elif char == ')':
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elif char == ')':
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