def deck_sort(c: Card) -> str:
s = ''
if c.is_creature():
s += 'A'
elif c.is_land():
s += 'C'
else:
s += 'B'
m = 'A'
for cost in c.get('mana_cost') or ():
if mana.has_x(cost):
m = 'X'
s += m
s += str(c.cmc).zfill(10)
s += c.name
return s
def test_has_x() -> None:
assert mana.has_x('{9}{X}')
assert not mana.has_x('{1}{W}{W}')
assert mana.has_x('{X}{Y}{R}')
assert not mana.has_x('{C}')
assert mana.has_x('{Y}{Z}')