gistfile1.txt

variable "cats" {
    type = "map"
    default = {
        "0" =  "grumpycat"
        "1" = "snellacat"
    }
}

variable "dogs" {
    type = "map"
    default = {
        "0" = "doge"
        "1" = "husky"
    }
}

resource "aws_sns_topic" "test" {
    name = "messages-from-${lookup(var.cats, count.index)}-to-${lookup(var.dogs, count.index)}"
    count = "${length(var.cats)}"
}