<algorithm, text> An algorithm for encoding a word so that
similar sounding words encode the same. The first letter is
copied unchanged then subsequent letters are encoded as
follows:
bfpv -> "1"
cgjkqsxzç -> "2"
dt -> "3"
l -> "4"
mnñ -> "5"
r -> "6"
Other characters are ignored and repeated characters are
encoded as though they were a single character. Encoding
stops when the resulting string is four characters long,
adding trailing "0"s if it is shorter. For example, "SMITH"
or "SMYTHE" would both be encoded as "S530".
