U V
I was bewildered by the above choice of phrase the first time, then I tried to type a certain word while withholding a certain letter... and then everything made sense ^^
Primary:
Sky
Slate
Blackcurrant
Watermelon
Strawberry
Orange
Banana
Apple
Emerald
Chocolate
Marble
Secondary:
Sky
Slate
Blackcurrant
Watermelon
Strawberry
Orange
Banana
Apple
Emerald
Chocolate
Marble
Pattern:
Blank
Waves
Squares
Notes
Sharp
Wood
Rockface
Leather
Honey
Vertical
Triangles