1
def get(p, t):
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    return max(3 * p / 10, p - p * t / 250)
3
 
4
a, b, c, d = map(int, input().split())
5
 
6
pm = get(a, c)
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pv = get(b, d)
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9
if pm > pv:
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    print('Misha')
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elif pm < pv:
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    print('Vasya')
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else:
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    print('Tie')
15