He application hi Synod Literature & Publication Board, Aizawl, Mizoram in kum 2005-a Kristian Hla Bu 18th Edition a published behchhana siam a ni a, PDF version chu source atan hman a ni. A features tlangpui te: 1. Voice recognition: Hla phek number sawiin a keu chhuah zung zung theih. 2. Tonic Sol-fa: Hla thu a awm bakah sol-fa a en theih bawk.