What are some examples of a numerical alphabet?

What are some examples of a numerical alphabet?

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Five equals L because when you hold up five fingers, it looks like an L. Six looks like a J, when you turn it around and three is an M, because when you take the M and turn it up, it looks like a three. A nine is a P, as if you turn it around, the nine becomes the P. Now these are consonants that have numerical values, the vowels have no value. T is one because it has one stroke. So if I give you the word "mat" like a welcome Mat, M is three, T is one and the A has no value. Six is our J, so Sixty-one, a J and a T, creates the word Jet, like a jet-plane; it is always number sixty-one. This is a very simple system called the numerical alphabet.