Can you crack the code?

 

Reb Avrohom Ganichovsky zt"l in his younger years 

 

This past Shabbos, I read parts of a biography on Harav Hagaon R. Avrohom Ganichovsky zt"l (R.Y. Tchebin) R. Avrohom Ganichovsky, whenever he met his friend להבדיל בין חיים לחיים, Harav Hagaon R. Dov Landau Shlita (R.Y. Slabodka) they spoke in learning in code language. One mentioned a few words or a מראה מקום and the other responded the same way. They both understood what the other meant to say. The ספר gives an example and writes, They met each other on Sunday פ' כי תבא and R. Dov Landau told him that during קריאת התורה of the past Shabbos he was thinking, "האם לא יוכל לשלחה חל על לא יוכל שלחה" To this Reb Avrohom Ganichovsky responded "בשלא כדרכה" There is no explanation in the ספר the meaning of this conversation or what's it's all about. Can you crack the code?