# 导入统计库
import statistics
# 计算较低的中间值
print(statistics.median_low([1, 3, 5, 7, 9, 11, 13]))
print(statistics.median_low([1, 3, 5, 7, 9, 11]))
print(statistics.median_low([-11, 5.5, -3.4, 7.1, -9, 22]))