see. https://github.com/cccties/chilo-producer/wiki/e00.Structure-of-CHiLO-Book
see. https://github.com/cccties/chilo-producer/wiki/e01.Production-of-CHiLO-Book#sozai2
see. https://github.com/cccties/chilo-producer/wiki/e01.Production-of-CHiLO-Book#output
see. https://github.com/cccties/chilo-producer/wiki/e01.Production-of-CHiLO-Book#check