val .countLetters = fn(.s) {
    for[=h{}] .s2 in split(replace(.s, RE/\P{L}/)) {
        _for[.s2; 0] += 1
    }
}

val .counts = .countLetters(readfile "./fuzz.txt")
writeln join "\n", map fn(.k) $"\.k;: \.counts[.k];", keys .counts