number to letter

local var = {9,6,27,25,15,21,27,18,5,1,4,27,20,8,9,19,28,27,25,15,21,29,18,5,27,7,1,25}

function changetoalph(x)
    local alphabet = {"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"," ",",","'"}
    return alphabet[x]
end

local a = ""

for i=1,#var do
    a = a..changetoalph(var[i])
end

print(a)