my 沙家浜: 這個......他字哪................奧秘藏,

Check my accent on YouTube: Shu Bethune "secret of he vs. hole", 7:00 pm (E).
https://www.youtube.com/watch?v=kLFxeark6OE  

hear my 沙家浜: 
這個......他字哪................奧秘藏,
see 他字藏 3 top tips or 土字五個頭, 3, 5屬於奇數, matches 奇數9 in /i/

may say 也字， 4個頭，對陰,對 also o6, too.