Lua Shuffle List

#!/usr/bin/lua

io.write('How many people? ')
p = tonumber(io.read())
io.write('How many teams? ')
t = tonumber(io.read())

if t > p then
 print('Error. You can\'t have more teams than players!')
 os.exit(0)
end

-- input
names = {}
for i=1,p do
 io.write(i .. ' > ')
 --table.insert(names, io.read())
 table.insert(names, string.char(64 + i))
end

-- shuffle
for i=1,p do
 a = math.random(1,p)
 tmp = names[a]
 names[a] = names[i]
 names[i] = tmp
end

-- output
print('')
nt = p / t -- base number of people per team
rem = p % t -- number of extra people
cpi = 1 -- current player index
for ti=0,t-1 do
 nt2 = nt
 if ti < rem then nt2 = nt + 1 end
 print('')
 for pi=0,nt2-1 do
  print(names[cpi] .. ' on team ' .. ti)
  cpi = cpi + 1
 end
end

os.exit(0)
for i=1,p do
 print(names[i])
end