How do I create 2 groups of curves?

Grasshopper
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How do I create 2 groups of curves? I want the 4 long curves to be in 1 group. curvess.gh (26.2 KB)

image
image1306×765 101 KB

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Canvas at 22;21;58
Canvas at 22;21;581546×451 153 KB

curvess_re.gh (27.6 KB)

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