[ Ntawv nyeem ] piv: [ Ntawv nyeem ]

☞ x ≔ ‘abc’.
☞ y ≔ ‘def’.
☞ z ≔ x piv: y.
☞ q ≔ y piv: x.
✎ sau ntawv: z, tsum.
✎ sau ntawv: q, tsum.
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3