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#https://softeer.ai/practice/info.do?eventIdx=1&psProblemId=408
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import sys
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numbers = list(map(int, sys.stdin.readline().split(' ')))
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ans = ''
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if numbers[0] == 1:
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ans = 'ascending'
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for n in range(1,len(numbers)-1):
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if numbers[n] - numbers[n-1] != 1:
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ans = 'mixed'
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break
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elif numbers[0] == 8:
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ans = 'descending'
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for n in range(1,len(numbers)-1):
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if numbers[n] - numbers[n - 1] != -1:
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ans = 'mixed'
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break
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else:
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ans = 'mixed'
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print(ans)

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