比较两个不等长度和不等维度列表

I have two lists, a and b:

我有两个列表,a和b:

a=[['apple'],['pear'],['grapes'],['cherry'],['mangoes'],['banana']]
b=[['apple',15,14],['orange',30,43],['pear',6,67],['grapes',90,709],['cherry',23,9]]
a=[[