You don't, not really. You just type them into a program that flips them. Theres one at Sunnyneo...
They're OIXZH
53045, and then turn the calculator upside-down
The Upside down T symbol indicates perpendicular lines.
In mathematics an upside down triangle corresponds to the gradient operator and is sometimes called "del". The Greek symbol of an upside down triangle is called "Nabla".
For All.
an upside down question mark = ALT + 168
ON
SIS
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concave
In a direct flip, only N, X, H, O and I are the same upside down. In a flip and rotate, S, E and D are also the same and, depending on the type of font, B and K may also be the same.
They are also letters upside down: y n u o s x and z Comment: Don't think that's it. Y is not an upside-down h. If this is it, c and l are missing from the set, and you'd have to allow p as an upside-down b. Besides, the answer could involve the capital letters instead.
Search google for "upside down text" and then you'll find websites where you can turn letters around!
There is more than just 1. C, D, O, S, and B are all curved letters that are the same upside down.
SWIMS (:
SOS
The upside down version: SWIMS The right side up version: SWIMS This is the word that is 5 letters in capitals the same turned upside down :)) Hope that helps all you smart kids out there <3