Hello Math-Fun, we want to spell some numbers with other numbers, like here: TWENTYONEsevenFOURTEEN This spells ONE because the letters in position 21, 7 and 14 are precisely E, O, and N: T W E N T Y O N E s e v e n F O U R T E E N 1 2 3 4 5 6 7 8 9 o 1 2 3 4 5 6 7 8 9 o 1 The above example is not unique – there are many ways to spell such numbers: ONEtwoTHREE (spells 1 with 1, 2, 3) TWENTYONEsevenFOURTEEN (spells 1 with 21, 7, 14 – opening example)* (...) The other part of the mail is on my webpage, with the question:

Is it possible to spell all numbers from 1 to 20 in the *star mode* (this is, without using in its spelling the number we want to produce)? https://bit.ly/3c9X7pI Best, É.