Sample rows of a list of matrices based on numbers from another list

Question

I have a list of matrices from which I want to randomly draw rows based on the numbers of another list. Here is the list of matrices:

x <- list(`1` = matrix(1:20, nrow=10), `2` = matrix(1:20, nrow=10))

Here is the list of numbers

y <- list(`1` = 2, `2` = 3) #for `1` I want to draw 2 rows and for `2` I want to draw 3 rows

The final list will look like this:

$`1`
      [,1] [,2]
 [1,]    1   11
 [2,]    6   16

$`1`
      [,1] [,2]
 [1,]    1   11
 [2,]    7   17 
 [3,]    9   19

How to achieve this in base R? Thanks for any help!