我怎样才能水平制作可变数字并列出清单?

所以我有一个是

['2019313251','V','11','58','am']

['2017393939','V','12','03']

['2020123456','V','13','24']

['1997031312','V','13','25']

['2013313990','V','13','32','pm']

['2018423519','V','14','10','pm']

['2019313251','E','2','58','pm']

['2017393939','V','3','03']

['2017393939','E','3','04']

['2019313251','E','5','48','pm']

['2017313882','E','17','54']

我想获取“ V”的a [2]值,并用它列出一个清单。

if a[1] == "V":
    b = a[2]
    b = b.strip().split(' ')

我尝试了这段代码,但输出是

['11']

['12']

['13'] ...等。我如何才能水平放置并列出要得到的结果,例如['11','12','13',...]