find duplicate characters count in a string

input: "Banana",

output: "B---------------1" , "aaa---------------3", "nn---------------2" 

any one try it anthor way ..

{

a!localVariables(
local!data: "Banana",
local!len: len(local!data),
local!merge: union(
a!forEach(
items: enumerate(local!len) + 1,
expression: local!data[fv!index]
),
a!forEach(
items: enumerate(local!len) + 1,
expression: local!data[fv!index]
)
),
local!all: a!forEach(
items: enumerate(local!len) + 1,
expression: local!data[fv!index]
),
a!forEach(
items: local!merge,
expression: index(
local!data,
wherecontains(fv!item, local!all),
{}
) & "---------------" & count(wherecontains(fv!item, local!all))
)
)

}

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