Personally I use lower case.
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There are number codes to make tildes. The number codes are different for each letter. In Windows, you hold down Alt while you type the appropriate number code for that letter. Capital letters and lower case letters require different number codes. Capital A with a tilde is Alt + 0195 Capital N with a tilde is Alt + 0209 Capital O with a tilde is Alt + 0213 lowercase a with a tilde is Alt + 0227 lowercase n with a tilde is Alt + 0241 lowercase o with a tilde is Alt + 0245 Don't use the numbers along the top row of your keyboard. Use the numeral keypad on the side of your keyboard. Turn Num Lock ON. There is a different way to do this in Mac, and yet another way to do it in HTML.
64 ( six to the fourth power) Exponents indicate the number of times that the base (6 in this case) is multiplied by itself. In this example, it's being multiplied four times, so we use the exponent 4.
To indicate something you don't understand
Use a period inside of the closing parenthesis to indicate that the sentence within the parentheses is ending. Use a period outside of the closing parenthesis to indicate that the sentence in which the parenthetical occurs is ending. Example: This was published in 1968 (Mary Jenkins looked it up.). or This was published in 1968. (Mary Jenkins looked it up.)
There is no adverb form for the verb climb, or climbed. You would need to use an adverbial prepositional phrase to indicate "in a climbing fashion."