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from math import floor
formation = ((1, 0), (2, 0), (3, 0), (2, 1))
next_formation = ((1, 1), (2, 2), (3, 1))
T = int(input())
for i in range(T):
m, x, y = tuple(map(int, input().split()))
close_x = [floor(x / (5 ** mx)) for mx in range(m)][::-1]
close_y = [floor(y / (5 ** my)) for my in range(m)][::-1]
for mag, mx, my in zip(range(m), close_x, close_y):
offset = (mx % 5, my % 5)
if offset in formation:
print("crystal")
break
elif offset in next_formation and mag != m - 1:
continue
else:
print("empty")
break
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