First and most important thanks in advance for assistance on this one.

I have two TF output maps below from vpc creation that need to be combined into required result:

azs = 
{ "list1" = tolist([ "eu-west-2a", "eu-west-2b", "eu-west-2c", ]) 
  "list2" = tolist([ "eu-west-2a", "eu-west-2b", "eu-west-2c", ]) } 

private_subnets = 
{ "subnets1" = [ "subnet-a", "subnet-b", "subnet-c", ] 
  "subnets2" = [ "subnet-d", "subnet-e", "subnet-f", ] }

Required result:
if list1 variable is matched then return list1 & subnets1 as per below. If list2 variable is matched then return list2 & subnets2.

list1 variable result:

subnets = {
 "eu-west-2a" = { id = "subnet-a" },
 "eu-west-2b" = { id = "subnet-b" },
 "eu-west-2c" = { id = "subnet-c" },
}

I have researched join command but that does not combine line by line.