def f(pattern, items):
result = []
for text in items:
pos = text.rfind(pattern)
if pos >= 0:
result.append(pos)
return result
assert f(" B ", [" bBb ", " BaB ", " bB", " bBbB ", " bbb"]) == []
CRUXEval-I
assert f(??) == []
CRUXEval-O
assert f(" B ", [" bBb ", " BaB ", " bB", " bBbB ", " bbb"]) == ??