let us walk in the snow 的音韵模式,韵脚

let us walk in the snow 的音韵模式,韵脚
该诗每节的韵脚是ababb,全诗的韵脚是什么?
原诗如下
ELVET SHOES
by Elinor Wylie
Let us walk in the white snow
In a soundless space;
With footsteps quiet and slow
At a tranquil pace,
Under veils of white lace.
I shall go shod in silk
And you in wool,
White as white cow's milk
More beautiful than the breast of a gull.
We shall walk through the still town
In a windless peace;
We shall step upon white down,
Upon silver fleece,
Upon softer than these.
We shall walk in velvet shoes:
Wherever we go
Silence will fall like dews
On white silence below.
We shall walk in the snow.