local string2Chunk = "sldkfjslkfjsdflksjlksdfjsdklfjsdflksjdflksdjsdkfljskldf"
-- could be from input


local function chunkString2Table(sString, iChunkLen)
 local retTable = {}
 local firstChunk
 while string.len(sString)>=iChunkLen do
    firstChunk = string.sub(sString, 1, iChunkLen)
    table.insert(retTable, firstChunk)
    sString = string.sub(sString, iChunkLen)
 end
if string.len(sString)>=1 then
  table.insert(retTable, sString)
end

return retTable
end
local chunkTable = chunkString2Table(string2Chunk, 10)

print (table.concat(chunkTable))