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#!/usr/bin/env lua
local function str_split(str)
local res = {}
str:gsub(".", function(c) table.insert(res,c) end)
return res
end
local function is_alphabetical_order(s)
local t = str_split(s)
for i=2,#t do
if t[i] < t[i-1] then return false end
end
return true
end
local function odd_one_out(t)
local count = 0
for i=1,#t do
if not is_alphabetical_order(t[i]) then count = count + 1 end
end
return count
end
print(odd_one_out({'abc', 'xyz', 'tsu'}))
print(odd_one_out({'rat', 'cab', 'dad'}))
print(odd_one_out({'x','y','z'}))
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