1:+one+ +two+ +three+: 2:x1y x2y x3y: 3:x1y x2y x3y: 4:mod-loop-varname: :x1y x2y x3y: :: 5:x1y x2y x3y: 6empty: :xy xy xy: 7mod-loop-resolve:w1d2d3w w2i3w w1i2d3 2i${RES3}w w1d2d3 2i${RES3} 1i${RES2}w: 8mod-loop-varname-dollar:(1) (2) (3). 9mod-loop-varname-dollar:() () (). 10mod-loop-varname-dollar:() () (). 11mod-loop-dollar:1: 12mod-loop-dollar:${word}$: 13mod-loop-dollar:$3$: 14mod-loop-dollar:$${word}$$: 15mod-loop-dollar:$$5$$: 16mod-loop-dollar:$$${word}$$$: 17exit status 0 18