2C      10-15, 4414/4315/3415/4405


2C  P   S/O
    2D  ask shape, inv+
    2HS S/O
    2N  C fit, often D stopper, inv+
    3C  7+D, puppet to 3D
    3D  44+ Ms, inv+
    3M  PRE
    3N  S/O
    4C  PRE
    4D  C rkcb
    4M  S/O
    4N  S rkcb
    5C  S/O


2C  2D
2H      min, 4414/3415/4315     (2S/3C=S/O, 2N/3M=inv, 3D=ask, rsp as below)
2S      4405                    (2N ask then 3CD=min/Max)
2N      Max, 4414
3C      Max, 3415
3D      Max, 4315
問完牌型後叫新花=確認王牌, 叫方塊=問控制數 rsp 0-2/3/4/5-6
          叫一局=S/O, 跳5線王牌=slam inv

2C  3D
3M      min, 4張M
3N      Max, broken C   (then 4D=ask 4M)
4C      Max, good C     (then 4D=ask 4M)
4D      void D          (then 4H=P/C)
4M      Max, 4張M       (then +1=rkcb)

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