[ Daim-ntawv-qhia ] ntawv-nyeem

var x := Daim-ntawv-qhia tshiab.
x muab: ['a'] rau: ['b'].
var y := x ntawv-nyeem.
Stdout sau-ntawv: y, tsum.
(Daim-ntawv-qhia tshiab) muab:['a'] rau:['b']