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Use "upper-case" in a sentence
"The Bariloche newspaper El Cordillerano topped its story on the airlines' return with an upper-case headline reading: "Hallelujha.""
"Capital can be a count noun when it refers to the head of a column or an upper-case letter."
"Ummmmm .... the frequent and repetitive use of the upper-case MAX makes this seem like it's an adults-only book and nothing in the press release says either way."