-- Homework 25, challenge -- solution module.

local M = {}

function M.shout(s)
    return string.upper(s) .. "!"
end

function M.echo(s, n)
    local parts = {}
    for i = 1, n do
        parts[i] = s
    end
    return table.concat(parts, " ")
end

function M.reverse_words(s)
    local words = {}
    for word in string.gmatch(s, "%S+") do
        table.insert(words, 1, word)
    end
    return table.concat(words, " ")
end

return M