Three-Suited Terminal Chows

What is Three-Suited Terminal Chows?

A Hand consisting of 1-2-3 and 7-8-9 in one suit (Two Terminal Chows), 1-2-3 and 7-8-9 in another suit, and a pair of fives in the remaining suit.

Three-Suited Terminal Chows example

Three-Suited Terminal Chows