To answer the first question let's take a look at typical mahjong set. There are thirty-three tiles with Bamboo image on it; four copies of bamboo suit tiles numbered from 2 to 9 (, ) and one copy of the "bamboo" flower (). Bamboo-1 typically is depicted in a form of bird.

To answer the second question, let's take a look at the "Green Book" Appendix 1. It says: "Nine Gates does not combine with Full Flush, Concealed Hand, and Pung of Terminals or Honors (Combines with Fully Concealed Hand if Self-Drawn.)"

Let's calculate total points earned for each different "tile with Bamboo image" on it drawn as the last tile from the wall. In other words:  +  /  /  /  /  /  /  /  / . For every one of these tiles except the last one, we have several scoring items in common: "Nine Gates" -- 88 points, "Last Tile Draw" -- 8 points, "Fully Concealed Hand" -- 4 points, totaling 88+8+4=100 points.

 / : 100 + 2 ("Two Concealed Pungs") + 1 ("Short Straight") + 0*2 ("Pung of Terminals or Honors") = 103. Total points won are (103+8)*3=333.

 /  /  / : 100 + 1 ("Short Straight") + 0 ("Pung of Terminals or Honors") = 101. Total points won are (101+8)*3=327.

: 100 + 2 ("Two Concealed Pungs") + 0*2 ("Pung of Terminals or Honors") = 102. Total points won are (102+8)*3=330.

: 100 + 16 ("Pure Straight") + 2 ("Tile Hog") + 0*2 ("Pung of Terminals or Honors") = 118. Total points won are (118+8)*3=378.

: The scenario as describes clearly states that Mr. Watson declares "hu" with the tile in question. Total points lost are -60 points, which is the penalty for declaring "Hu" (a win) without a valid winning-hand structure.

 

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