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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Um ... all right:

IGUESSSO: Um ... all right
AHEM: Um, I'm right here
HELLO: Um ... I'm standing right here!
AHEM: [Um ... I'm standing right here]
AHEM: Um, hello, I'm stading right here