derektypist/project-euler-017

If the numbers 1 to 5 are written out in words: one, two, three, four, five, then there are 3 + 3 + 5 + 4 + 4 = 19 letters used in total. The aim is to find the number of letters used if all the numbers from 1 to n (e.g. 1000) inclusive are written in words.

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