Converts non-negative base-10 integers to base-1000, and then back again. This makes large numbers (ex: 1234567890987654321, nineteen characters) tiny (1ħѩᓺᕠᐎȓ, seven characters). This is useful for storing normally very long data in small units. This example is wired up to the "e" and "d" keys (standing for "encode" and "decode"). IMPORTANT: SOME CHARACTERS LOOK SIMILAR, BUT ARE DIFFERENT. ONLY COPY+PASTE AND DON'T MANUALLY TYPE TO RECREATE IT. Thanks to https://en.wikipedia.org/wiki/List_of_Unicode_characters
