如何使用lua对单词的字母进行混洗

local word = "example"

local chars = {}
for i = 1, #word do
    chars[i] = word:sub(i, i)
end

for i = #chars, 2, -1 do
    local j = math.random(i)
    chars[i], chars[j] = chars[j], chars[i]
end

local shuffledWord = table.concat(chars)

local word = "example"

local chars = {}
for i = 1, #word do
    chars[i] = word:sub(i, i)
end

for i = #chars, 2, -1 do
    local j = math.random(i)
    chars[i], chars[j] = chars[j], chars[i]
end

local shuffledWord = table.concat(chars)

print(shuffledWord)