[Swift] 문자열에서 특정 문자 찾기

import Foundation
let input = readLine()!

// let input = "xl30gjdhaI1gdfkl|dlh;(rn4ky1kgndlIIldfl|ld|dBjfdsfsdfdsfHd"

var oneCount = 0
var ICount = 0
var lCount = 0
var flagCount = 0

var array = input.map{(char) -> Character in
    switch char{
    case "1":
        oneCount = oneCount + 1
        break
    case "I":
        ICount = ICount + 1
        break
    case "l":
        lCount = lCount + 1
        break
    case "|":
        flagCount = flagCount + 1
        break
    default:
        break
    }
        return char
}

print(oneCount)
print(ICount)
print(lCount)
print(flagCount)