Two Thieves

Two Thieves

Mr. North is a thief in North City. Mr. South is a thief in South City.

Mr. North steals things in South City. And Mr. South steals things in North city.

One day, Mr. North lost something. “ It must be Mr. South. "

Mr. South lost something too. " It must be Mr. North! ”

What will Mr. North and Mr. South do?