>>16049911X = a pair of shoes
Y = a man wearing no shoes and no wrist weights
Z = a pair of wrist weights
The last line does not feature a pair of shoes, a man wearing no shoes and no wrist weights, and a pair of wrist weights.
It features one shoe, aka half of X, aka (X÷2).
It features a man wearing a pair of shoes and a pair of wrist weights, aka (Y+X+Z).
It features one wrist weight, aka half of Z, aka (Z÷2).
