What sounds are used as assonance in the poem below?
"The Harbor"
Passing through huddled and ugly walls, By doorways where women haggard Looked from their hunger-deep eyes, Haunted with shadows of hunger-hands, Out from the huddled and ugly walls, I came sudden, at the city's edge, On a blue burst of lake, Long lake waves breaking under the sun On a spray-flung curve of shore; And a fluttering storm of gulls, Masses of great gray wings And flying white bellies Veering and wheeling free in the open.​